avarietyof和varietiesof的区别?
在Longman中的答案:
avarietyofsomething:alotofthingsofthesametypethataredifferentfromeachotherinsomeway,e.g.
Thegirlscomefromavarietyofdifferentbackgrounds.
varietyof:atypeofthing,suchasaplantoranimal,thatisdifferentfromothersinthesamegroup,e.g.
Thelakehasmorethan20varietiesoffish.