critical mass

英 [ˌkrɪtɪkl ˈmæs]

美 [ˌkrɪtɪkl ˈmæs]

n.  (核链式反应的)临界质量

电力

牛津词典

noun

• （核链式反应的）临界质量
  the smallest amount of a substance that is needed for a nuclear chain reaction to take place

柯林斯词典

• (核链式反应的)临界质量
  In physics, thecritical massof a substance is the minimum amount of it that is needed for a nuclear chain reaction.
• N-SING (某事发生或继续所需的)足够数量
  Acritical massof something is an amount of it that makes it possible for something to happen or continue.
  1. Only in this way can the critical mass of participation be reached.
     只有这样才能凑足参与人数。

英英释义

noun

• the minimum mass of fissionable material that can sustain a chain reaction
• the minimum amount (of something) required to start or maintain a venture
  1. the battle for the computer market has now reached critical mass
  2. there is now a critical mass of successful women to take the lead
  3. they sold the business because it lacked critical mass

双语例句

• Nuclear fission has contributed to our society some new phrases& "critical mass" and "critical size". Correlation of critical mass velocity has been provided.
  原子核裂变给我们的社会带来了一些新词汇&临界质量和临界大文中还给出了临界质量流速的试验关联式。
• The next thing it hit, a year later, was critical mass.
  一年以后，它进入下一个阶段，也就是临界量。
• What happens when the number of students making that choice reaches a critical mass?
  如果如此选择的学生变成了大多数，会怎样？
• I read as much as I could find for background to my recent novel, Critical Mass.
  我在写最新小说《临界物质》时，为了了解背景知识读了所有我能找到的书。
• Only in this way can the critical mass of participation be reached.
  只有这样才能凑足参与人数。
• In this case, 20 percent is often a good proxy for critical mass in a household.
  通常，20%的家庭拥有量是技术达到临界量的一个合理标志。
• Often some sort of competency center is a good approach to building a critical mass of the appropriate skills.
  某种形式的能力认证中心通常是建立大量急需合适技能的好途径。
• We have a critical mass of banks.
  我们已经有了数量可观的银行。
• This creates what is known as a critical mass of nuclear material, which releases its energy instantaneously as atoms inside it split in an uncontrolled chain reaction.
  这会造成核原料所谓的临界质量，当其中的原子在无法控制的连锁反应中分裂时，能在瞬间释放出能量。
• I decided that I had spent enough time on this and had a "critical mass" of features available.
  我决定，我已经花了足够的时间和进行了“足够数量的可用的功能”。