critical mass
短语[电] 临界质量
发音
其它
词形变化
critical masses
复数
critical masses
释义与例句
n.
-
1.
The minimum amount of fissile material needed to support a self-sustaining nuclear chain reaction.
可数 不可数 -
2.
The minimum amount of something or the minimum number of people needed to trigger a phenomenon.
可数 比喻 不可数 引申义