树叶变黄掉下来 Les feuilles d'automne jaunit ; Automne laisse changer au jaune ; Jaunissement des feuilles des arbres
而当冬天来临，树叶掉光，房子的黑色外立面能够吸收阳光，再加上火炉的使用，房子的能耗将会降低。
In the winter, when the trees lose their leaves, the building's black exterior absorbs sunlight and with the fireplace, there is a reduction in fuel consumption "."
一片树叶只要能留在树上就不应该松手往下掉。
微风拂过，树叶哗哗往下落；无风时，树叶也会簌簌地往下掉。
Breeze and the wind blowing, leaves to the whereabouts of; no wind, the leaves will fall down.
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