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

Mathematics is the foundation upon which all sciences are built.

I try to listen to what the site is saying. I don't impose my will on it.

風(fēng)險(xiǎn)管理不是關(guān)于避免風(fēng)險(xiǎn)，而是關(guān)于理解和管理風(fēng)險(xiǎn)。

The stream of thought, of consciousness, is always flowing.

寫(xiě)作就是面對(duì)存在的混亂并強(qiáng)加某種秩序。