Records show that during December and January, the two months with the fewest hours of daylight, attendance rates fall, average daily class participation drops, and grades decline.
记录表明在日光最少的十二月和一月，出席率下降，每日平均课程参加量减少，分数降低。
Records show that during December and January, the two months with the fewest hours of daylight, attendance rates fall, average daily class participation drops, and grades decline.
记录表明在日光最少的十二月和一月，出席率下降，每日平均课程参加量减少，分数降低。
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