He pitched headforemost downstairs.他从楼梯上倒栽葱摔下来....

headforemost的音标：headforemost的英式发音音标为：['hed'fɔ:məʊst]headforemost的美式发音音标为：['hed'fɔməst]...

adv.头向前地，不顾前后地...