What's the difference between must and necessary?

Must


Definition:

  • (v. i. / auxiliary) To be obliged; to be necessitated; -- expressing either physical or moral necessity; as, a man must eat for nourishment; we must submit to the laws.
  • (v. i. / auxiliary) To be morally required; to be necessary or essential to a certain quality, character, end, or result; as, he must reconsider the matter; he must have been insane.
  • (n.) The expressed juice of the grape, or other fruit, before fermentation.
  • (n.) Mustiness.
  • (v. t. & i.) To make musty; to become musty.

Example Sentences:

  • (1) Such a signal must be due to a small ferromagnetic crystal formed when the nerve is subjected to pressure, such as that due to mechanical injury.
  • (2) The catheter must be meticulously fixed to the skin to avoid its movement.
  • (3) The significance of minor increases in the serum creatinine level must be recognized, so that modifications of drug therapy can be made and correction of possibly life-threatening electrolyte imbalances can be undertaken.
  • (4) One must be suspicious of any gingival lesion, particulary if there is a sudden onset of bleeding or hyperplasia.
  • (5) For assessment of clinical status, investigators must rely on the use of standardized instruments for patient self-reporting of fatigue, mood disturbance, functional status, sleep disorder, global well-being, and pain.
  • (6) To this figure an additional 250,000 older workers must be added, who are no longer registered as unemployed but nevertheless would be interested in finding another job.
  • (7) They had learned through hard experience what Frederick Douglass once taught -- that freedom is not given, it must be won, through struggle and discipline, persistence and faith.
  • (8) Careful attention must be given to antibiotic choice as well as the dose and duration of therapy.
  • (9) Before carrier vaccines are applied, these risks must be thoroughly evaluated case-by-case.
  • (10) This suggests that molars do not maintain a fixed relationship to incisors over time, and extreme care must be taken to standardize an experiment to a specific body weight when using this method.
  • (11) For retrospective action to be taken, and an FA charge to follow, the decision of the panel must be unanimous.” The match between the sides ended in acrimony and two City red cards.
  • (12) Although esmolol may be used as a primary hypotensive agent, the potential for marked myocardial depression must be recognized.
  • (13) After the diagnosis of a soft-tissue injury (sprain, strain, or contusion) has been made, treatment must include an initial 24- to 48-hour period of RICE.
  • (14) Since the plasmid-cured strains did not contain DNA sequences homologous to plasmid DNA, the gene for the free-inclusion protein must be encoded in the chromosome.
  • (15) If women psychiatrists are to fill some of the positions in Departments of Psychiatry, which will fall vacant over the next decade, much more attention must be paid to eliminating or diminishing the multiple obstacles for women who chose a career in academic psychiatry.
  • (16) Research must continue to determine the optimal regimen that suppresses testosterone activity with the least amount of toxicity.
  • (17) Renal arteriography is therefore alone capable of answering two primordial questions: "Must surgery be undertaken and when operating, what surgical tactics to adopt".
  • (18) Which must make yesterday's jobs figures doubly alarming for the coalition.
  • (19) It is commonly assumed that the visual resolution limit must be equal to or less than the Nyquist frequency of the cone mosaic.
  • (20) In assessing damaged nets and curtains it must be recognised that anything less than the best vector control may have no appreciable impact on holoendemic malaria.

Necessary


Definition:

  • (a.) Such as must be; impossible to be otherwise; not to be avoided; inevitable.
  • (a.) Impossible to be otherwise, or to be dispensed with, without preventing the attainment of a desired result; indispensable; requiste; essential.
  • (a.) Acting from necessity or compulsion; involuntary; -- opposed to free; as, whether man is a necessary or a free agent is a question much discussed.
  • (n.) A thing that is necessary or indispensable to some purpose; something that one can not do without; a requisite; an essential; -- used chiefly in the plural; as, the necessaries of life.
  • (n.) A privy; a water-closet.
  • (n.) Such things, in respect to infants, lunatics, and married women, as are requisite for support suitable to station.

Example Sentences:

  • (1) Apparently, the irradiation with visible light of a low intensity creates an additional proton gradient and thus stimulates a new replication and division cycle in the population of cells whose membranes do not have delta pH necessary for the initiation of these processes.
  • (2) The low affinity of several N1-alkylpyrroleethylamines suggests that the benzene portion of the alpha-methyltryptamines is necessary for significant affinity.
  • (3) Intravesical BCG is clearly superior to oral BCG, and controlled studies have demonstrated that percutaneous administration is not necessary.
  • (4) These studies show that metabolic activation is necessary for the expression of the mutagenic activity of aflatoxins B1 and G1 in N. crassa.
  • (5) In practice, however, the necessary dosage is difficult to predict.
  • (6) In order to control noise- and vibration-caused diseases it was necessary not only to improve machines' quality and service conditions but also to pay special attention to the choice of operators and to the quality of monitoring their adaptation process.
  • (7) It is likely that trunk mobility is necessary to maintain integrity of SI joint and that absence of such mobility compromises SI joint structure in many paraplegics.
  • (8) If there is a will to use primary Care centres for effective preventive action in the population as a whole, motivation of the professionals involved and organisational changes will be necessary so as not to perpetuate the law of inverse care.
  • (9) Obamacare price hikes show that now is the time to be bold | Celine Gounder Read more No longer able to keep patients off their plans outright, insurers have resorted to other ways to discriminate and avoid paying for necessary treatments.
  • (10) Duesberg contends that HIV is neither necessary nor sufficient to cause AIDS.
  • (11) It is therefore necessary, to look at typical clinical manifestations, i.e.
  • (12) We have examined the in vitro membrane assembly characteristics of a variety of leader peptidase mutants and found that domains required for insertion in vivo are also necessary for insertion in vitro.
  • (13) Two hours after the administration, the combinations of ethanol plus diazepam and ethanol plus meclophenoxate impaired significantly the number of necessary repetitions.
  • (14) The first experiment gave good results, although only one participant had any previous experience of hinge axis location, and it is debatable whether or not this experience is necessary before satisfactory results can be obtained.
  • (15) For consistent identification of the normal pancreas, preliminary longitudinal scanning at, or near, the mid-line and subsequent oblique scanning in the long axis are necessary prerequisites in delineating the anatomic outline of the pancreas.
  • (16) Survival and healing of "extremely severe" grade intoxication can only be obtained through a surgical intervention within the first hours; a laparotomy will indicate the depth of the lesions, which is not determined by endoscopy, and will consist of Celerier's stripping method and if necessary a gastrectomy, more seldom a cephalic duodeno-pancreatectomy.
  • (17) Socio-economic improvement or behavioural changes appear necessary for the control of trachoma in endemic areas.
  • (18) This stimulation is mediated by one receptor with an apparent affinity of 3.3 X 10(-6) M. The hydroxyl group in the para position on phenylethanolamine was absolutely necessary to obtain an agonist whereas the meta hydroxyl group or the presence of a catechol almost suppressed the activity.
  • (19) Provided that adequate reflection is given and the appropriate moment chosen, it is well tolerated and provides all the necessary information.
  • (20) Total excisional biopsy is necessary to properly assess an adenoma microscopically.