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 aim of proof is to understand, not just to verify.

Mathematics is the key and door to the sciences.

世界上最成功的社會是那些能夠?qū)姶蟮膰遗c法治和民主問責(zé)制結(jié)合起來的社會。

I would like to make it clear, in parenthesis, that I do not blame my parents for their point of view. There is an expiry date on blaming your parents for steering you in the wrong direction; the moment you are old enough to take the wheel, responsibility lies with you.

Forgiveness to the injured does belong; but they ne'er pardon who have done wrong.

In the end, we only regret the chances we didn't take.

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.