These illegals were members of KGB.是什么意思？

These illegals were members of KGB.

这群间谍是克格勃成员.

these

adj. 这些的；pron. 这些；

例句
There's lots of money about these days for schemes like this.
近来这类计划资金充足。

illegals

abbr. illegal aliens 非法外侨；n. 非法移民，非法劳工( illegal的名词复数 )；

例句
These illegals were members of KGB.
这群间谍是克格勃成员.

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。

members

n. 成员( member的名词复数 )，分子，身体部位（尤指胳膊或腿）；

例句
...one of the brightest and ablest members of the government...
政府里最聪明能干的成员之一

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。

KGB

n. 克格勃（前苏联的秘密警察）；

例句
We took it as read that he must have been a KGB agent...
我们完全相信他曾经是一名克格勃特工。