军事学
裂变式原子弹
裂变炸弹
Both claim to be able to build not only fission bombs like those dropped on Hiroshima and Nagasaki, but also more fearsome hydrogen bombs.
ECONOMIST: It's worse than you thought
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。