名詞 vitals:

1. a bodily organ that is essential for life
   同義詞：vital organ

1. The leader's vital and cheerful manner filled his men with courage.
   指揮官朝氣蓬勃和歡欣愉悅的神態(tài)使士兵們勇氣倍增。
2. The first thing to be done was to head off the enemy from the tender spots and vital places.
   首先要做的事是防止敵人從防守不嚴的部位及要害地方逃走。

vi.tals

pl.n.（復數(shù)名詞）
The vital body organs.
要害器官
The parts essential to continued functioning, as of a system.
要害命脈：為繼續(xù)運行的基本部件，如一個系統(tǒng)的基本部件