whistle

n. 口哨,汽笛,啸啸声
v. 吹口哨,鸣汽笛,用口哨通知

He gave a loud whistle of gladness.

他吹了一声响亮的口号表示高兴。

A bullet whistled past his head.

一颗子弹从他头顶上呼啸而过。