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 in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.

The wise can predict the future, fools only see the present.

除了在自私起作用的地方，人性更傾向于愛而不是恨，這是人性的優點。

To write is to engage with the world.