名词
中文翻译：Unknown
同义词：
['suitable time', 'appropriate time']
例句：
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1.It's important to choose the proper time for a meeting.
选择合适的时间开会很重要。
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2. He decided to wait until the proper time to tell her about his plans.
他决定等到合适的时机才告诉她自己的计划。
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3. The teacher advised us to take our proper time to finish the homework.
老师建议我们慢慢完成作业。