v.痛哭；发出似哭的尖声；悲叹
n.痛哭；尖叫声
There's no use wailing about/over mistakes made in the past. 为过去的错误痛哭是没有用的。
The women gathered around and began to wail. 妇女们围拢在一起,开始嚎啕大哭。
The wind wailed in the forest all night. 风在林子里彻夜呼啸。
She was wailing for her lost child. 她为死去的孩子伤心悲痛.
用作名词 (n.)Newborn babies begin their life with a wail. 新生儿痛哭一声便开始了他们的生命。
The exhausted mother smiled at the wail of her newborn baby. 听到新生儿的哭叫声，倦极了的母亲笑了。
I heard the wail of a police siren. 我听见警笛的尖叫声。
wail既可用作不及物动词，也可用作及物动词。用作及物动词时，一般接that从句作宾语，表示“哭着说出某一事”。
