| 单词 | lifejackets |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔Mayday〕He raced to pick up the lifejackets while his stepmother sent out a Mayday call.他的继母发出无线电求救信号的时候，他飞跑着去拿救生衣。柯林斯高阶〔USELESS〕The lifejackets turned out to be useless, because they didn't inflate properly. 因为充不了气，结果这些救生衣毫无用处。朗文写作活用 |
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