士兵们必须对上暗语才能通过检查站。

The soldiers had to give the correct watchword to pass the checkpoint.

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The soldiers had to give the correct watchword to pass the checkpoint.

watchword 由 watch(看守、警戒)和 word(词语)组成,字面意思是"警戒用的词语",引申为"口令、暗语"的意思。

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