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

教育是點燃火焰，而不是填滿容器。

The real challenge is not just building climate models, but interpreting what they tell us.

Chemistry is the bridge between the microscopic world and the reality we see every day.

The best marketing strategy is a product so good it markets itself.

每本書都是一句引文；每座房子都是從所有森林、礦山和采石場中引用的；每個人都是從他所有祖先中引用的。