sighing

The only answer was a long sighing from the tired old man.

用法提示：sighing 在这里作可数名词，指一声叹息。

Amid the quiet room, a sudden sighing made everyone look up.

用法提示：sighing 作名词表示叹息声，前面用冠词修饰。

She tried to hide her disappointment, but a faint sighing escaped her lips.

用法提示：sighing 作名词，指从嘴边发出的一声叹息。