名词
中文翻译：见证者
同义词：
['spectator', 'observer', 'eyewitness']
例句：
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1. He was a witness to the crime scene.
他是犯罪现场的目击者。
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2. She witnessed the sunset from her balcony.
她从她的阳台上亲眼看到了日落。
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3. The witness testified that he saw the thief steal the car.
证人作证说他亲眼看到了小偷偷车。