"This is a quiet study area, please respect other library user and keep noise to a minimum." .
这是一个安静的学习场所，请尊重其他在图书馆的人并把声音控制在最小的范围之内。
Those who plan to come please arrive on time and keep quiet when attentive listening is required.
这些计划来参加讲座的人，请准时到达，在细心倾听时保持…
Those who plan to come please arrive on time and keep quiet when attentive listening is required.
这些计划来参加讲座的人，请准时到达，在细心倾听时保持…
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