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

As Will Rogers would have said, "There is no such thing as a free variable."

DNA is the ultimate history book, written in the language of life.

生命是一段旋律，大聲唱出來(lái)。

One should not believe or disbelieve， but rather remain in suspense.

我是那種會(huì)一直堅(jiān)持下去直到成功的人。