精品无码久久久久久国产_成人午夜在线视频一区_亚洲最大的av网站_亚洲欧美综合区自拍另类_91精品国产一区_日韩精品中文在线观看_一道本无吗dⅴd在线播放一区_国产精品旅馆在线_欧美午夜久久久_亚洲自拍在线观看_黑人精品xxx一区一二区_亚洲精品日韩久久久_在线视频一区二区_国产欧美久久一区二区_中文字幕精品在线视频_成人欧美在线观看

If you are not willing to learn, no one can help you. If you are determined to learn, no one can stop you.

You don't learn to walk by following rules. You learn by doing, and by falling over.

技術是工具，人才是核心。

Chemistry is not just about what you can make, but how you can make it.

To die laughing must be the most glorious of all glorious deaths！

數學的目標是理解宇宙的模式。