名词
中文翻译：Unknown
同义词：
['observer', 'observer', 'observer']
例句：
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1. The scientist is an oecist who studies the behavior of animals in the wild.
这位科学家是一位观察者，研究野生动物在野外的行为。
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2. The oecist has been observing the stars for over a decade.
这位观察者已经观测星星超过十年了。
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3. The oecist noticed that the temperature had dropped significantly.
这位观察者注意到温度明显下降了。