headfirst基本解释
adv.头向前地;仓促地;鲁莽地
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异体字: headforemost
adv.头向前地;仓促地;鲁莽地
adv.头向前地;仓促地;鲁莽地
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异体字: headforemost
"a headfirst plunge down the stairs"
"a headlong dive into the pool"
"the runner slid headlong into third base"