Cannot Hear Your Sound 不能听你可靠
If your neighbor hears one loud sound, he'll stop what he's doing and wait to hear it again.
如果你的邻居听到一声巨响,他会停下手头事情,听听会不会还有动静。
You might hear a crunching or clicking sound when you bend or extend your knee.
当你弯曲或伸展膝盖的时候可以听见卡吧喀吧的响声。
Check your fire detectors once a month. Make sure the batteries are good and the sound is loud enough for everyone in the building to hear.
每个月检查一下自己的火灾探测器,保证所有的电池都有充足的电量,警报铃的铃声可以让办公楼里的每一个人都听到。
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