The winter solstice, theoretically should be the dead of a year, but it is usually not that.

理论上讲，冬至应是全年最冷的时刻，但通常并不是这样。

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Huaizhi Kang, the first author of the paper reporting the findings said, "It is easy to assemble, has fewer parts and theoretically should be more efficient."

发表这项研究报告的HuaizhiKang称：“这种马达易于装配，而且工作效率方面理论上讲也更高。”

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Huaizhi Kang, the first author of the paper reporting the findings said, "It is easy to assemble, has fewer parts and theoretically should be more efficient."

发表这项研究报告的HuaizhiKang称：“这种马达易于装配，而且工作效率方面理论上讲也更高。”

youdao