BBC news 2010-09-22 加文本

1.They argue that military readiness will be damaged by reversal of the existing policy “don’t ask, don’t tell” which allows gay people to serve provided they don’t reveal their sexuality.

参考翻译：他们辩称，违反现有的“不问，不说”政策将对军队造成损害。现有政策允许同性恋人群在军队服役，但是不允许他们披露自己的性取向。

结构分析：provided引导条件句

given与provided意思一样,表示“如果有……,则……”,
但两者的区别是provided后面只能跟that引导从句,而不能跟名词或名词性短语。而given后既可跟从句,又可跟名词性短语。

Given the present conditions, I think she's done rather well.
考虑到目前的条件, 我认为她已做得相当出色。

2.The Mexican government has said there can be no negotiation with drug trafficking gangs after a newspaper appealed to the cartels for guidance on what it should publish to avoid having its journalists killed.

参考翻译：一份报纸向卡特尔组织请教，他们应该发表什么样的内容，他们的记者才不会被杀害。墨西哥政府表示，与毒品走私团伙之间不可能进行谈判。

结构分析：这句话的主语和谓语是：The Mexican government has said，后面是宾语从句。宾语从句的主干是there can be no negotiation。after a newspaper appealed to是时间状语。