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》
2
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。
3
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.