As a general rule, all muscular effort is enhanced by breathing in as the effort is made.

一般规律是，肌肉都通过用力吸气而增强力量。

《柯林斯英汉双解大词典》

To better understand breathing during sleep, it is, however, helpful to first understand how respiration works in general.

然而，为了更好地理解睡眠中的呼吸，首先了解呼吸的一般工作原理是有帮助的。

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She developed symptoms on 19 February 2010 and was taken to the Son Duong District General Hospital on 24 February where she is currently being treated for mild breathing difficulties.

她于2010年2月19日出现症状，2月24日被送往山阳县综合医院，她目前正因轻度呼吸困难接受治疗。

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It affects voluntary muscle activity including speaking, walking, breathing, swallowing and general movement of the body and usually causes progressive disability.

WSJ: ATP World Tour Chief Brad Drewett to Step Down Over Lou Gehirg's Disease Diagnosis

General Petraeus candidly admits that the surge will be in vain unless the breathing space his troops are trying to create is used by the Shia-led government to embrace a wider range of Sunnis, offering concessions on among other things the constitution and the sharing of oil.

ECONOMIST: Iraq