witness可数吗

witness

/ ?w?tn?s; ˋw?tn?s/ n

[C] (a) (also `eye-witness) person who sees an event take place (and is therefore able to describe it to others) 目击者: witnesses (at the scene) of the accident 事故（现场）的目击者 * I was a witness to their quarrel. 我是他们吵架时的目击者.(b) person who gives evidence in a lawcourt after swearing to tell the truth （在法庭上经宣誓的）证人: a defence/prosecution witness 被告的[原告的]证人 * a witness for the defence/prosecution 被告的[原告的]证人 * The witness was cross-examined by the defending counsel. 证人受到辩护律师的诘问. (c) person who is present at an event, esp the signing of a document, in order to testify to the fact that it took place 见证人（尤指见证签署文件的）: Will you act as witness to the agreement between us? 您作我们协议签署时的见证人行吗?

[U, C usu sing 作不可数名词或可数名词, 后者通常作单数] (fml 文) what is said about an event, etc, esp in a lawcourt; (thing that serves as) testimony or evidence 证词（尤指法庭中的）; 证明; 证据: give witness on behalf of an accused person 为被告作证 * His ragged clothes were (a) witness to his poverty. 他的破烂衣物可以证明他很贫穷.