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

事情在最得意時(shí)要防樂極生悲，話說到最忘形時(shí)要防言中有失。

"La memoria es el único paraíso del que no podemos ser expulsados."

It does not matter how slowly you go as long as you do not stop.

生活若無波折險(xiǎn)阻，就會(huì)過于平淡無奇。

Profit without purpose is chemistry without catalysts - possible, but painfully slow and inefficient.

Anybody who has been seriously engaged in scientific work of any kind realizes that over the entrance to the gates of the temple of science are written the words: Ye must have faith.