回合的英文：
bout
go-around

参考例句：

This season, the Second Group Phase has been abolished in favor of a two-legged knockout round.
本赛季，原先的第二阶段小组赛改为两回合的淘汰赛。

A boxing-match of ten rounds
十回合的一场拳击比赛

Hoya was penalised a point for excessive holding in the sixth round.
霍亚在第6回合因过度持抱对方被扣一分。

In the sixth round,experience beat youth as Moya landed a right punch,knocking Todorov out.
姜还是老的辣。在第6回合,莫亚一记右直拳将托多罗夫击倒。

A round in a fight
打个回合

Five rounds were fought.
较量了五个回合。

A turn at wrestling.
摔跤运动的一个回合

The termination of a batsman's innings.
击球手一个回合的结束

The Dutch had won the first round.
那个荷兰人赢了第一回合。

I had won the first encounter.
我已经赢了第一个回合。

bout是什么意思：
n. 拳击（摔跤）比赛；较量；一阵；发作；回合

How many periods are there in a bout?
这场比赛有几局？

I was suffering with a bout of nerves.
我感到一阵紧张。

He has been suffered from recurrent bouts of depression.
他一直经受着反复发作抑郁症的折磨。

I suffered bouts of really hysterical depression.
我曾患阵发的严重癔病性抑郁症。

This will be his eighth title bout in 19 months.
这将是他19个月里的第8次卫冕赛。

around是什么意思：
adv. 大约；在周围，在附近；旋转；四处
prep. 在周围；在某处；围绕；四处

play around with
在一起厮混|玩弄|戏弄

The blades of the propeller turned around and around.
螺旋桨不停地转动着。

to wind around; to curl up; to revolve around; to orbit
旋绕

Press about [around] sb.
拥挤[密集]在某人周围

A casual saunter around the shops.
逛商店。