Adverb:

1. with the feet foremost;

   "he jumped into the pool feetfirst"
   

feetn.脚；英尺名词foot的复数形式.feet of clay foot泥足,不堪一击feet-first jump脚先水入的直体跳水Feet Board Measure木材量度feet on the groundn.实事求是的想法(脚踏实地)Feetfirst position足前位feet-bent burial屈肢葬feet-first slide用脚前伸滑垒feet-first entry脚先入水的跳水动作Feet per Revolution英尺/转feet-pound-second英尺磅秒单位制的

1. The swimmer jumped into the water feetfirst.
   那泳客脚先着水地跳进水中。
2. The man was carried out feetfirst.
   那人死了而被抬走。