1. He fell headfirst down the stairs.
他头朝前从楼梯上摔了下来。

2. The child jumped headfirst into the pool.
孩子头朝前跳进了泳池。

3. She went headfirst into the new project.
她全身心投入到新项目中。

4. He rushed headfirst into the situation without thinking.
他没多想就贸然投入了那个情况。

A: Be careful when you climb the ladder.
A：爬梯子时要小心。

B: I almost fell headfirst yesterday.
B：我昨天差点头朝前摔下来。

1) 表示头部在前的动作方式

2) 引申为鲁莽或直接投入某事

3) 用于描述快速进入某种状态或行为

1. 头朝前地；头先着地地

e.g. He slipped and fell headfirst.
他滑倒并头朝前摔了下去。

2. 鲁莽地投入

e.g. She went headfirst into the challenge.
她鲁莽地投入了挑战。

adverb

1. with the head first; in a forward, head-leading position or manner.

Synonym: headlong, forward