CNN不能独自证实李是否为杰克工作过.用英语怎么说？

CNN不能独自证实李是否为杰克工作过.

CNN could not independently verify whether Lee worked with Jackson.

CNN

abbr. centrosomin 中心体；

例句
Unsuccessful at screen writing, he got a spot on a CNN film show.
写电影剧本未获成功后，他在美国有线新闻网的一档电影节目中争取到了一个固定时段。

could

aux. “can”的过去式，能够，打算，用于假设语气的条件句，用于虚拟语气的结论句；

例句
The regulations were relaxed and the prisoners could get out and about a bit.
规定有所放宽，犯人可以出去短暂放风。

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

independently

adv. 独立地，自立地，无关地；

例句
At the same time, CAST Group can design make mould independently aciding to customer request.
同时, 本公司可根据客户需求自主设计和制造模具.

verify

vt. 核实，证明，判定；

例句
Inspectors were sent to visit nuclear sites and verify compliance with the treaty...
监督员被派去视察核武器基地并核实条约的遵守情况。

whether

conj. 是否，无论；

例句
They had their tablets analysed to find out whether they were getting the real drug or not.
他们将药片拿去化验以查明他们得到的是否是真药。

lee

n. 避风处，庇护所；adj. 背风的，保护的，庇荫的；

例句
Dr Lee believes that men who exercise can halve their risk of cancer of the colon...
李医生相信，锻炼身体能使患结肠癌的风险降低一半。

worked

adj. 处理过的，作装饰用的；v. （使）工作( work的过去式和过去分词 )，（使）运作，运转，（使）产生效果；

例句
The women who worked in these mills had begun to agitate for better conditions.
在这些工厂里做工的妇女们开始抗议要求改善工作条件。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

Jackson

n. 杰克逊（美国密西西比州首府）；

例句
Mr Jackson had a natural constituency among American blacks...
杰克逊先生在美国黑人中拥有自发的支持。