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Divers should carry an easily activated noise maker that's clearly heard underwater.
潜水员应该都随身携带一个能在水下发出清晰可听见的大声音的东西。
youdao
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When you are busy, a boy is a trouble-maker and a noise.
当你忙碌时，男孩儿会给你添乱，弄出噪音；
youdao
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When you are busy, a boy is a trouble-maker and a noise.
当你忙碌时，男孩儿会给你添乱，弄出噪音；
youdao