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observer

英 [əb'zɜːvə] 美[əb'zɝvɚ]
英英释义 考试真题 实用场景例句
  • n. 观察者；[天] 观测者；遵守者

英英释意

1. a person who becomes aware (of things or events) through the senses
2. an expert who observes and comments on something