According to psychologist Dr. Paul Becker, sunlight, or the lack thereof, is the key to the winter blues.

心理学家保罗·贝克尔博士认为，阳光的充足与否是造成冬天忧伤情绪的关键。

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According to psychologist Dr. Paul Becker, sunlight, or the lack thereof, is the key to the winter blues.

心理学家保罗·贝克尔博士认为，阳光的充足与否是造成冬天忧伤情绪的关键。

youdao