这节课的重点是制作风筝;风筝是如何制作的,它们的外观和用途。
The focus of this lecture is kite making; how the kites were made, their appearance and the purposes they served.
太阳黑子是磁场的事实解释了它们的黑色外观。
The fact that sunspots are magnetic fields accounts for their dark appearance.
我认为在未来,材料将会得到改进,它们的外观和触感将会像我们今天所知的面料那样,比如像棉花或丝绸那样。
I think in the future, materials will evolve, and they will look and feel like fabrics we know today, like cotton or silk.
They don't look the same, they don't behave the same, they don't perform the same biological functions.
它们外观上不一样,生命活动不一样,它们的生物学功能各不相同
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