n.做;不能接受;难以完成;事件;
v.做( do的现在分词 );干;学习;研究;
例句:
This is obviously her doing.
这事明明是她干的嘛!
He is doing research on radiant intensity.
他在研究辐射强度.
He would doubtless disapprove of what Kelly was doing.
他不会赞同凯利做的事。