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。