efforts的中文翻译
efforts怎么读
efforts to
efforts pay off
efforts to do sth用法
efforts可数吗
efforts paid off
effort什么情况下可数
effort什么情况下加s
efforts made in vain
efforts是什么意思
efforts音标
efforts什么意思
effort是什么意思
efforts的音标
efforts是什么意思中文翻译
effort是可数还是不可数
efforts发音
make efforts to do和doing的区别