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

Space and light and order. Those are the things that men need just as much as they need bread or a place to sleep.

I'm not afraid of loneliness because music accompanies me.

數(shù)學之美不在于其復雜性，而在于其簡潔性以及它揭示的關于宇宙的深刻真理。