somebody who observes or makes an observation
somebody sent to observe but not participate officially in something, e.g. a conference or congress
somebody who accompanies the pilot of an aircraft to make observations
| 单词 | observer |
| 释义 | observernounsomebody who observes or makes an observation somebody sent to observe but not participate officially in something, e.g. a conference or congress somebody who accompanies the pilot of an aircraft to make observations |
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