01首先...其次...此外...拆分版，任你组合：first/firstly⇨tostartwith;tobeginwith;inthefirstplacesecond/secondly⇨inthesecondplace;next;inthenextplacethird/then/besides⇨whatsmore;furthermore;inaddition;moreover组合版，高级搭配：first...second...third...⇨Oneis...Anotherrelatesto...Athird+n.例句Oneisthatthecontentofonlinecoursesisvaried.Anotherrelatestotheflexibilityofonlineclasses,thetimeandplac...
