一群的英文：
gang
regiment

参考例句：

A herd,especially of buffalo or elk.
一群野牛，一群驼鹿

A horde of ruffians
一群流氓

A string of islands
一群岛屿

A bunch of sheep
一群羊

A gang of robbers
一群强盗

A circle of friends
一群朋友

A pack of wolves
一群狼

A herd of buffaloes
一群水牛

A herd of cattle
一群牛

A skulk of foxes
一群狐狸

gang是什么意思：
n. 一帮，一伙；一队人，一组人，一群人
v. 结成一伙

This is a gang of chisels.
这是一套凿子。

The depredations of the gangs terrified the neighborhood.
歹徒们的劫掠行为使街坊邻居惊恐万状。

To band together as a group or gang.
使成一组作为一群或一帮结合在一起

A menacing gang has breached the palace
皇宫已被一群用心险恶的人给包围了

Gangs terrorized the neighborhood by their depredations
歹徒们用劫掠恫吓街坊邻居。

regiment是什么意思：
n. 团；一（大）批
v. 把…编成团；严格地管制

A regiment of ducks had come.
一大群鸭子过来了。

A brass band led the regiment.
该团由一支铜管乐队引导。

Schoolboys and schoolgirls should not be regimented.
对中小学的学生不应管理太严。

Why do you think a regiment of Southerners is worth two regiments of Easterners?
你说一个团的南方人为什么抵得上两个团的东部人？

This regiment was entirely composed of mercenary troops.
这个团完全是由雇佣兵组成的。