We can use him as a backup if one of the other players drops out.

　　如果有參賽者退出，我們可以用他作為替補(bǔ)。

　　You can't have one without the other, as the song says

　　就像歌里唱的`那樣，兩者密不可分，不能只取其一。

　　My three guitars broke one after the other

　　我的3把吉他陸續(xù)都?jí)牧恕?/p>

　　Sybil ate three biscuits, one after the other

　　西比爾接連吃了3塊餅干。

　　He looked from one to the other of them, then salaamed and left.

　　他掃了他們每個(gè)人一眼，行了個(gè)額手禮就離開了。