If you have to listen to something when you're out, use only one earphone or play it at a very low volume.
如果你必须在外出时听一些东西,只使用一个耳机或把音量调小。
It prowls at night, tapping its finger rapidly against tree branches to listen for hollowed-out pockets in the wood that hold grubs.
它在夜晚游走,用手指迅速敲击树木来倾听镂空的树洞里是否有蛴螬。
Once the baby's heartbeat can be heard with a special device, the doctor will listen for it at each visit.
等到胎儿的心跳声可以通过一种特别的以及听到之后,医生也会时刻注意这一点。
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