?可裂变钚
可裂变钚
That happens when fissionable nuclear materials, such as uranium or plutonium, are brought together in sufficient quantities and under the right conditions so that a chain reaction begins.
CNN: 'We're Scared for Our Baby'
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。