head-first
柯林斯词典
1. ADV If you move headfirst in a particular direction, your head is the part of your body that is furthest forward as you are moving. 头向前地[ADV after v]
He had apparently fallen headfirst down the stairwell. 他看上去是从楼梯井口头朝下摔下来的。
返回 head-first
headfirst /ˈhɛdˈfɜːst/ (also head-first)
剑桥词典
- with the head going first
头朝前的 返回 head-first