| 单词 | 被替换 |
| 释义 | 〔overcommit〕To allocate or apportion (money, goods, or resources) in amounts incapable of replacement.调拨过度：以不能被替换的量分配（钱、食物或资源）〔relief〕Release from a post or duty, as that of sentinel.换哨：从职位或义务上被替换下来，如换岗哨〔breechblock〕The metal part that closes the breech end of the barrel of a breechloading gun and that is removed to insert a cartridge and replaced before firing.炮闩，枪闩：关闭后膛装弹枪的枪后部的后膛的金属部分，可以拆卸下来装子弹并在射击前被替换 |
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