共青团的英文：
the Communist Youth League

参考例句：

I've been to the league office.
我去过共青团办公室了。

communist是什么意思：
n. 共产主义者；共产党党员
adj. 共产主义的；共产党的

The League was led by Communists.
这一同盟是由共产党领导的。

He is a staunch communist.
他是个坚定的共产主义者。

They shine with the brilliance of the communist spirit.
他们身上闪耀着共产主义精神的光辉。

youth是什么意思：
n. 青春（时期）；初期；青年们

The Flight of Youth
青春飞逝

My youth and youthful strength fled long ago.
我的青春和青春的活力早已消失。

The youth has plenty of go in him.
这个年轻人干劲十足。

league是什么意思：
n. 联盟，同盟；盟约；联合会
v. 组成联盟，结盟

They are not in the same league.
他们的水平有高低。

Make a league with me.
和我订立盟约吧。

The League was led by Communists.
这一同盟是由共产党领导的。