答 *:mostly 是全部中的大部分.1.主要强调时间. 如本题...2.强调主要的场合.如,Green teas are mostly from China or Japan.. 3强调一组人员的大部分成员. 如.There were about fifteen people in the lounge , mostly women在这个意义上相当于mainly. *mainly 一般强调1.主要成分或主要组成部分.如:This kind of drink is mainly made of water and sugar.这一意义和mostly相同如,the workforce is mainly/mostly made up of women);2.强调某事发生的主要原因或对某事解释的主要理由.如.I don’t go out much, mainly because I have to look after the kids. /Her illness was caused mainly by stress.参考资料： http://blog.***.cn/s/blog_59e454f90100d3tf.html。