a的用法例句

A schoolgirl rushed into a burning apartment to save a man's life.

一名女學童衝進一棟着火的`公寓去救一個男子的命。

A personal diet plan is devised after a consultation with a nutritionist.

經向營養師作諮詢後，一份個人飲食方案設計出來了。

A lion is a dangerous animal.

獅子是猛獸。

As a teacher, he's a disaster.

他當老師壓根兒就不稱職。