Children show amarked increase in eveningness from around age 13 to late adolescence, and, on balance, more people under 30 are evening types.

大约在13岁到青春期后期，儿童中晚上类型的人明显增多。 总的来说，在30岁之前，晚上类型的人居多。

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Children show amarked increase in eveningness from around age 13 to late adolescence, and, on balance, more people under 30 are evening types.

大约在13岁到青春期后期，儿童中晚上类型的人明显增多。 总的来说，在30岁之前，晚上类型的人居多。

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