他们遭到了流窜作案的抢劫团伙的袭击。用英语怎么说？

他们遭到了流窜作案的抢劫团伙的袭击。

They were raided by roaming bands of marauders.

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

raided

vi. 对…进行突然袭击（raid的过去式与过去分词形式）；

例句
Hardly had he returned to London when an anonymous well-wisher called to say he was about to be raided by Customs & Excise.
他刚回到伦敦，就有一个不愿透露姓名的好心人打来电话说，他即将面临海关的突击检查。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

roaming

v. 随便走( roam的现在分词 )，漫步，眼睛或手 （缓慢地）扫遍，摸遍；

例句
Bands of government soldiers, rebels and just plain criminals have been roaming some neighborhoods.
成群结队的政府军士兵、反叛分子和彻头彻尾的犯罪分子一直在一些街区游荡。

bands

n. 法官，牧师或博士服的领饰，带( band的名词复数 )，乐队，衣带，价

例句
This year numerous bands are playing, as well as comedy acts...
今年除了那些搞笑短剧外，还会有众多乐队登台献艺。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

marauders

N-COUNT 强盗;抢劫者;攫食的动物；

例句
Harry uses the Marauders Map - which was confiscated in the last book.
哈利在查看活点地图 —— 而那地图在上一部书里已被没收了.