色多多在线观看播放-色多多在线观看高清免费-色多多在线观看视频-色多多在线看-欧美aaaaa性bbbbb小妇-欧美aaaav免费大片

The more you know, the more you realize how little you know.

The successful trader has to fight two powerful enemies: the market and himself.

The power of abstraction is what allows mathematics to transcend the limits of physical reality.

The major problems in biology are not solved by new techniques, but by new ideas.

海洋漁業(yè)的未來取決于政府、企業(yè)和當(dāng)?shù)厣鐓^(qū)之間的合作。

寫作是一種疾病，而出版則是它的癥狀。