She takes an active part in school life.

　　她積極參加學校活動。

　　He's completed 30 years of active military service.

　　他已經服完30年的現役。

　　The virus is still active in the blood.

　　這種病毒仍然在血液中起作用。

　　Although he's nearly 80, he is still very active.

　　盡管快80歲了，他還是十分活躍。

　　She plays an active part in local politics.

　　她積極參與地方政治活動。