vital

adj. /ˈvaɪ.t̬əl/ B2

至关重要的；必不可少的

Extremely important and completely necessary.

仙境例句

It was vital to hold the baby's right ear and left foot, so that it could not get away.

一定要抓住小婴儿的右耳朵和左脚，这样它才跑不掉。