The trade wind is a kind of natural cold source in spring, autumn and winter.
新风在春、秋、冬季是一种天然的冷源。
The wind energy in the area is rich, especially in spring and winter.
其结果表明该区域的风能是丰富的，尤其是春季和冬季。
It is very cold in winter and has heavy wind in spring of northern China.
中国北方冬天很冷，春天风很大。
It is very cold in winter and has heavy wind in spring of northern China.
中国北方冬天很冷，春天风很大。
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