Don't arrive late for class. You must be on time.
上课不要迟到。你必须准时上课。
As for those who arrive late or leave early without proper reason, if the total time is equivalent to one class hour, then it will be recorded as their having been absent for one class hour.
无故迟到或早退者，其迟到或早退时间累计每超过一学时，按旷课一学时计。
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