a.

1. 生命的；維持生命所必需的[Z][B]
   Growth and decay are vital processes.

   生長和衰亡是生命過程。

2. 充滿活力的，生氣勃勃的
   The Chinese I knew were trusting, open, and vital.

   我所認識的中國人信賴別人，坦率，充滿活力。

3. 極其重要的，必不可少的[（+to/for）]
   The questions put forward at the meeting are of vital importance.

   會上提出的那些問題極其重要。

4. 致命的；生死攸關的
   He committed a vital error.

   他犯了一個致命的錯誤。

n.[theP]

1. （人體的）重要器官
   He was lucky that the bullet missed the vitals.

   他很幸運，子彈沒有擊中要害器官。

2. 重要部分，要害

adj.

1. absolutely necessary; essential.
   ▸indispensable to the continuance of life:

   the vital organs.
2. full of energy; lively.
3. archaic fatal.

n.