Some animals are inactive during the daytime.

　　有些動物白天不活動。

　　The satellite had been inactive since its launch two years ago.

　　該衛(wèi)星自從兩年前發(fā)射以來一直沒起作用。

　　He certainly was not politically inactive

　　他政治上當(dāng)然不是無所作為。

　　The volcano is inactive.

　　這座火山已進(jìn)入休止?fàn)顟B(tài)。

　　This expression is used to describe someone who is inactive.

　　這個(gè)短語通常用來形容某人沒反應(yīng)、不活躍。