词汇	虎喙
释义	虎喙 hǔ huì虎口。亦比喻險惡之境。
随便看	precursor electron precursor emission pattern precursor epidermal growth factor domain precursores precursor event precursor fault precursor feeding precursor fiber precursor fibre precursor film precursor fission product precursor-follow effect precursor-follower effect precursor fragment precursor fragments precursor front precursor gas precursor homology domain precursor identification precursories precursor impregnation precursor impregnation procedure precursor incorporation precursor indicators precursor infiltration and pyrolysis