head-first entry头先入水的跳水动作
head-first slide头前滑垒
head-first头向前地
Head of first rib第一肋骨头;第一肋头部
Head First Servlet JSP清晰中文版
Head First Statistics深入浅出统计学;深切浅出计数学
Head First WordPress深入浅出
Head First iPhone Development新手iPhone程序开发
release your head first头部先回正
ADV（副词） 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。