动词短语
中文翻译：在考察期
同义词：
['under observation', 'under review', 'in trial']
例句：
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1. The student was on probation for breaking the school rules.
这个学生因为违反校规而被观察。
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2. The company is on probation until the investigation is complete.
公司正在等待调查结果，在此期间处于观察期。
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3. The judge decided to put the defendant on probation for six months.
法官决定将被告置于观察期六个月。