by turns是什么意思?

by turns是什么意思? by turns与in turns有什么区别 in turn和by turns的区别 do sth.by turns啥意思 She laughed and cried by turns.翻译 the book is,by turns,funny and very sad.by turns能不能换成in turn by turns 和in turns在用法上有什么区别? in turn 和 by turns怎么用怎么区别 let's drive the car by turns.(改为同义句) sex bomb turns you on到底是什么意思啊? take turns to ask and answer questions是什么意思 Bag snatcher turns out to be policeman是什么意思