They were accused of unlawful assembly.是什么意思？

They were accused of unlawful assembly.

他们被控非法集会。

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。

accused

n. 被告；v. 指责(accuse的过去式和过去分词)，控告；adj. 被控告的；

例句
Her assistant was accused of theft and fraud by the police...
她的助手被警方指控犯有盗窃和欺诈罪。

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。

unlawful

adj. 非法的，违法的，不合法的，不正当的，私生的；

例句
They were accused of unlawful assembly.
他们被控非法集会。

assembly

n. 立法机构，议会，集会，装配；

例句
The assembly arrogated to itself the right to make changes...
大会越权作出变更。