环游世界的英文：
to travel round the world; to go on a tour round the world; to take a round-the-world tour

参考例句：

To take a round-the-world out
环游世界

I would like to take a trip around the world toward the end of this year.
我想在今年底环游世界。

I'm hoping to tour around the world.
我正盼望环游世界。

Drake sailed round the world.
德雷克扬帆环游世界.

They've set off on a journey round the world.
他们已经开始环游世界.

to circumaviate the earth
搭飞机环游世界

I have a dream of traveling around the world.
我梦见我环游世界。

She flew the plane around the world.
她驾机环游世界。

He decided to run around the world to try to escape the pain.
他决心环游世界，摆脱伤痛。

After travelling around the world he went Broke.
"环游世界旅行之后,他就破产了。"

travel是什么意思：
n. 旅行，旅程
v. 旅行，游遍；传导；移动，（眼睛）扫视；行走，行驶

A cosmopolitan traveler.
四海为家的旅行者

They are travelling entertainers.
他们是巡回演出的艺人。

He travels the fastest who travels alone
独行者走得最快;无家累者易发展

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。

world是什么意思：
n. 世界；宇宙；领域；世人；人世；天体，星球

This may be normal in the physical world, but there is no reason for it in the world of software.
在物理世界这是正常的，但没有理由在软件世界也这样。

They wanted to revolutionize the whole world.
他们要在全世界发动革命。

That are inexorably shaping the world of tomorrow.
这将无情地影响明日的世界。