key witness

基本解释

The state’s key witness, Shmuel Dechner, now 73, served for years as the Holyland project’s fixer but fell out with his employers.
国家关键证人Shmuel Dechner现年73岁，在圣地项目中担任调停人员多年，但与雇主发生了纠纷。
Most of his alleged bribe money—a good 2m shekels ($537, 000), according to the key witness—is said to have gone on medical equipment.
据一位关键证人透露，他受贿的金额多达2百万舍客勒（$537,000），大部分资金已用于购买医疗设备。
A Brooklyn attorney hopes to break new ground this week when he offers a brain scan as evidence that a key witness in a civil trial is telling the truth, Wired.com has learned.
《连线》杂志日前获悉，美国纽约市布鲁克林区（Brooklyn）的一名律师希望在本周开创司法证据的新局面，届时他将提供一份大脑扫描图作为证据，以证明一桩民事审判案件中关键证人的证词是属实的。

In Ebbers' case, the government's key witness is Scott Sullivan , WorldCom's former chief financial officer.
FORBES: Martha Verdict's Bad News For Bernie
Landis also was a key witness in a USADA investigation last year that exposed Armstrong's doping.
NPR: USADA Lobbied DOJ To Join Lawsuit
The government's key witness in refuting their claims was Douglas Faneuil , a brokerage assistant to Bacanovic.
FORBES: Martha Verdict's Bad News For Bernie

关键证人
We can construct the rule for key witness in such aspects as the application and decision of the appearing of witness, summon, signature of paper of guarantees and inquiries.
我们应当从出庭作证的申请和决定、传唤、保证书签署、询问和质证等几方面,构建关键证人出庭作证的具体规则。