Each school day has six periods with a ten minute recess between.
每一个上课日分为六节，中间各休息十分钟。
They had undoubtedly made progress in the six years that separated the two periods.
他们无疑在那两个时期之间的6年里取得了进步。
Six practice periods are required in applying today's idea.
今天的观念需要练习六次。
Six practice periods are required in applying today's idea.
今天的观念需要练习六次。
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