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

知識是解開宇宙奧秘的鑰匙。

People are not lazy. They simply have impotent goals - that is, goals that do not inspire them.

In the end, we will remember not the words of our enemies, but the silence of our friends.

榮譽羞著我，因為我暗地里追求著它。

發現的喜悅是科學家們前進的動力。

創造就是活兩次。