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 appearing in court证人出庭witness refuses to testify证人拒证witness with one's own eyesn.系船缆witness refusing to testify出庭难witness for the prosecution原告证人witness providing evidences证人作证witness not appear in court证人不出庭witness-preparation skill证人准备技能witness against the accused[法] 证明被告有罪witness protection mechanism证人保护制度

1. You have a dirty mark on your face.
   你脸上有个脏点。
2. The witness said he never thought of it.
   这位证人说他压根儿没想到这点。