例句：
I bought one of the leading brands.
我买了几个畅销品牌中的'一种。
I heard a playback of one of the tapes.
我听到了其中一盘录音带的回放。
I had made arrangements for my affairs to be dealt with by one of my children
我已经安排我的一个孩子处理我的事务。
One of the bags was lost en route.
其中一个包在途中丢失了。
I think that is one of the major ingredients in his success.
我认为那是他成功的主要因素之一。
