witnessn.目击者；证人vt.目击；经历；见证；出席；观察vi.证明；为(宗教信仰)做见证Witness Anonymity证人隐名witness step down证人退席witness to a will[法] 遗嘱见证人witness to a deed契的证人witness statement证人陈述witness to a fact为事实作证witness testimony证人证言Witness protective证人保护制度witness confidence证人信心witness a document在文件上签名作证