环游的英文：
round trip

参考例句：

During our motor trip round England we averaged 200 miles a day.
当我们驾车环游英国各地时，平均每天行200英里。

round是什么意思：
adj. 圆形的；整数的
adv. 周围；在周围；调转方向；绕弯；到某地
prep. 环绕；围绕
n. 阶段；轮次；圆形物体；【音】轮唱曲
v. 绕行；绕过；（使）成圆形；变圆

There is a round circuit.
这有一个环型赛车场。

The water wheel goes round and round.
水车转个不停。

When you squeeze the trigger, a round or rounds of ammunition are fired.
当你紧按板机，一发或几发子弹就射出了。

The revolving sign was spinning round and round in the wind.
旋转的标志牌在风中打著旋儿

Round and round—to make a circle and start from the beginning
周而复始

trip是什么意思：
n. 旅行；行程；跌倒，失足；失误；轻捷的步伐
v. 绊倒；失足；使失误，使犯错误；轻快地走

The trip needs careful planning.
这趟行程需要周密计划。

The trip bushed us.
旅行使我们筋疲力尽。

They chartered a bus for the trip.
为这次旅行他们租了一部巴士。

meditate a trip abroad
计划作一次出国旅行

He has gone on a business trip.
他出差去了。