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 scientist is not a person who gives the right answers, he's one who asks the right questions."

History does not forgive forgetting.

約化群理論是朗蘭茲綱領的支柱。

Take away love and our earth is a tomb.

若要培養人才，就應當向四方外國學習。

白立方并非中立——它承載著自己的文化包袱。