需要量的英文：
demand quantity
requirement

参考例句：
  • Television sets and stereo sound sets are now in great demand
    电视机和立体声音响设备现在的需要量很大。
  • Nutritionists set requirements of dietary fiber at 25- 50 g\day.
    营养学家规定膳食纤维的需要量为25～50g\日。
  • Pure wool is often mixed with other type fibers and recovered wool to meet the demand.
    纯羊毛通常与其它纤维或再生毛混纺以满足需要量。
  • People who are overweight should look at their calorific, nutritional and dietary requirement beforehand.
    超重的人应该看看他们对热量，营养和规定食物的需要量是什么。
  • The vitamin B12 requirements appear to depend upon the levels of choline, methionine and folic acid in the diet
    维生素B12的需要量决定于食品中胆碱、蛋氨酸以及叶酸的含量。
  • According to this model a monolayer of fines coating the coarse is the minimum needed to bring the viscosity down
    按照这个模型，粗粒物料覆盖以单层细粉是使粘度降低至细粉粘度的最小需要量。
demand是什么意思：
n. 要求，所需之物；需求，需要
v. 要求；询问，质问；命令；需要
  • It is the demand, stupid.
    傻瓜，答案是需求。
  • Demand exceeds supply. The supply is not adequate to the demand．
    供不应求
  • I demand a recount.
    我要求重算。
quantity是什么意思：
n. 量，数量，许多，大量
  • dimensionless quantity
    无因次值|无量纲的量
  • Bill of quantities: The specification of the quantity of materials to be used.
    工程量清单;建筑工程清单;数量清单:指项目所用材料的数量及其规格的清单。见priced bill of guantities
  • Quality is better than quantity
    不求其多,但求其精
requirement是什么意思：
n. 需要；必需品；要求；必要条件；规定
  • Is the requirement compulsory?
    必须按这个需求做吗？
  • In practice, this will often require a prioritization of your job requirements.
    实务上，这往往需要重新调整工作的优先顺序。
  • All systems requiring accurate timing will require a crystal.
    所有需要精确定时的系统都要用晶体。

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