There will be two intervals during the performance.

演出期间将有两次休息。

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Note, that first two intervals may not comply with this rule.

注意，最开始的两个重复学习间隔不一定遵守这个法则。

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We take a rest at intervals of two hours.

我们每隔两小时休息一次。

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We take a rest at intervals of two hours.

我们每隔两小时休息一次。

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