沪友详解A：at the top of one's lungs
也可以说"at the top of one's voice". 意思是“声嘶力竭地喊叫”（With an extremely loud voice）.
可以用于以下情况：
1） 当感到十分惊讶、诧异或者愤怒时而发出叫喊：
When she saw the accident, she cried at the top of her lungs.
2) 为引起别人注意而大声喊叫或者表示声音很大的状态：
The babies in the nursery all were crying at the top of their lungs.
I yelled at the top of my lungs to get tom’s attention. But he seems to be deaf.
我声嘶力竭地大喊想要引起汤姆的注意。不过他像是聋了一样。

at the top of one's lungs
网络释义
1. 用尽量大的声音
at the time of 在
at the top of one's lungs 用尽量大的声音
at the top of the tree 登峰造极
2. 声嘶力竭
at the helm (掌控全局 )
at the top of one's lungs (声嘶力竭)
not enough room to swing a cat (没有足够的转身空间)