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.
看到树叶子掉，我就想到九教前的毛白杨，高大的毛白杨。
Saw the leaves falling, reminded me there are many poplar trees before No. nine building, the tall and big poplar trees.
看到树叶子掉，我就想到九教前的毛白杨，高大的毛白杨。
Saw the leaves falling, reminded me there are many poplar trees before No. nine building, the tall and big poplar trees.
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