在一个阳光灿烂的一天。
Whether sunny day, rainy or cloudy days, like your life is always a sunny day!
不管晴天，雨天还是阴天、愿你的生活中永远都是一片艳阳天！
Today is a sunny day, I like sunny days.
今天是晴天，我喜欢晴天。
A sunny day in winter is colder than a sunny day in summer. This is because the summer day is longer, everything has a longer time to warm up and the sun shines more directly on the earth.
一个冬天的晴日要比一个夏天的睛日冷，因为夏天的白天比较长，一切东西受热的时间较长，太阳直射到地球上。
A tinfoil region on the surface of the aero-generator can be used for solar electrical energy generation in a windless sunny day or a weak-wind sunny day.
在无风或弱风的晴天可以利用其表面的“锡箔”区域进行太阳能发电。
A tinfoil region on the surface of the aero-generator can be used for solar electrical energy generation in a windless sunny day or a weak-wind sunny day.
在无风或弱风的晴天可以利用其表面的“锡箔”区域进行太阳能发电。
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