The teacher assigned each of the children a different task.

　　老師給每個兒童都布置了不同的作業(yè)。

　　Assign a different colour to each different type of information.

　　給每類信息分別確定一種顏色。

　　He nibbled her ear playfully.

　　他開玩笑地輕咬著她的耳朵。

　　You need a good ear to master the piano.

　　彈好鋼琴需要有敏銳的辨音能力。

　　Everything I tell them just goes in one ear and out the other.

　　我無論對他們說什么都只被當作耳邊風。