headfirst
adv.头向前地，不顾前后地
网络解释.头向前地；不顾前后地；头朝前；头朝前式
adv.1.匆忙地;贸然地释义下的同义词
carelessly impulsively impetuously hastily rashly recklessly
双语例句
1. 1 . He lost his balance, and pitched out of the window headfirst .
他失去平衡, 头朝下从窗子上跌了下去.
来自《简明英汉词典》