He made the calls from behind his closed bedroom door, but the apartment was not large and the door was hardly soundproof.
他打电话时总把自己关在卧室里，房门紧闭。但公寓并不大，房门也基本上毫不隔音。
Imagine you're about to take a bath in a soundproof bathroom. There are no Windows. There's only one door, and it locks automatically from outside when shut.
假设你准备在一间隔音的浴室里洗澡，浴室没有窗户，只有一扇门，门一旦关上就自动锁起来，从外面才能打开。
Imagine you're about to take a bath in a soundproof bathroom. There are no Windows. There's only one door, and it locks automatically from outside when shut.
假设你准备在一间隔音的浴室里洗澡，浴室没有窗户，只有一扇门，门一旦关上就自动锁起来，从外面才能打开。
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