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

Speech is a kind of action， and our words are the tools we use to perform it.

物理學不僅僅是解決問題，它是關于理解現實的本質。

你給予的越多，得到的也越多。

The only way to achieve long-term success is to create real value for customers, employees, and society.

真正的無知不是知識的缺乏，而是拒絕獲取知識。