歌手每天都要练习吸气呼气，因为如果没有肌肉张驰有度的支持，他们的声带发音就不够强健。
Singers practice breathing every day, since their vocal chords are not strong enough without the controlled support of their muscles.
我最近看了一个健身的文章，作者说很多人不能强健肌肉可能是锻炼太多，而不是不够。
I recently read a fitness article where the author stated that many people who fail to build muscle might be working out too much, rather than not enough.
我最近看了一个健身的文章，作者说很多人不能强健肌肉可能是锻炼太多，而不是不够。
I recently read a fitness article where the author stated that many people who fail to build muscle might be working out too much, rather than not enough.
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