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

你必須花費一些精力和努力才能看到數學的美。

"The only way to discover the limits of the possible is to go beyond them into the impossible."

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

"We're not perfect, but we're perfect for each other."

【釋義】不做那些自己不該做的事，不要貪圖那些不屬于自己的東西。

Failure is simply the universe's way of teaching you what not to do next time.