by turns强调“一个接一个”和“轮流”,带有“循环”的意思,而in turn强调“顺序”,是“依次相继地”的意思。in turn还有“反之、反过来”的意思,而by turns没有这层意思。
by turns例句
1.They wash dishes by turns. 他们轮流洗碗碟。
2.The book is, by turns , funny and very sad. 这部书时而妙趣横生,时而悲悲戚戚。
3.Mary and Jane rode by turns . 玛丽与珍尼轮流骑。
in turn例句
1.There were cheers for each of the women as they spoke in turn. 女士们依次发言时,每一位都得到了喝彩。
2.Feeding each other in turn. 相互轮流喂食。
3.We look after him in turn. 我们依次照顾他。
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