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

It's not supposed to be easy.Anyone who finds it easy is stupid.

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

I do not much like to take the tone of a moralist.

"The world is full of obvious things which nobody by any chance ever observes."

"Innovation is the ability to see change as an opportunity - not a threat."

關(guān)于煤炭的討論必須超越"支持"或"反對(duì)"—我們需要解決方案，而不是口號(hào)。

The most significant threat to liberal democracy today is not from rival ideologies like communism or fascism, but from within—from the rise of populism and the erosion of democratic norms.