来回的英文：
make a round trip
make a return journey

参考例句：

To toss or throw back and forth.
来回投掷

To move to and fro over;cross and recross.
来来去去在…上来回移动;来回穿行

The swing of tides
海潮的来回流动

The cheerleaders are jumping to and fro.
拉拉队长们来回地跳跃。

The pendulum swung slowly to and fro
钟摆在慢慢地来回摆动。

I 'd like to buy a roundtrip ticket to Honolulu.
我想买一张到檀香山的来回机票。

They swayed back and forth, more or less in sync with the music.
他们来回摇摆，基本上与音乐同步。

The bucket swung from the end of a rope
水桶吊在绳上来回摇汤

To move back and forth or to and fro,especially rhythmically and rapidly.
摆动，振动迅速并有节奏的来回移动

The speedometer was rocking between sixty and sixty-five.
里程计在60与65之间来回摆动。

make是什么意思：
v. 做；制造；生产；使得；获得；准备；引起；开始；使成为，产生；构成
n. 形状；样式；制造；构造；品牌

a man of this make
这种性格的人

make an example of
1.惩罚...以儆戒他人

make a dive for
向￥冲去

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。

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。