1FORWARDif you fall head-first, your head goes down first, and the rest of your body follows afterwards 头朝下地
dive/fall/jump/plunge head-first
I fell head-first down the stairs.
我一头栽下楼梯。
2HURRYif you do something head-first, you become involved in it too quickly, without having time to think about it carefully 仓促地,鲁莽地
a remark that sent him tumbling head-first into another controversy
让他鲁莽地陷入另一场争论的言论
Examples from the Corpus
head-first• First he flung the man head-first into the snow.• But it takes a mightyage to tell its tale and diveshead-first into the soapsuds along the way.