问一个英语词组

问题描述:

问一个英语词组
let out

let out
放出,释放(水、空气等);呼(气)
It lets sunlight in but doesn't let heat out...
它吸收阳光,但并不释放热量.
Meer let out his breath in a long sigh.
米尔长叹了一口气.
发出(声音)
When she saw him,she let out a cry of horror.
她看见他时吓得大叫一声.