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

The universe is not just stranger than we imagine, it is stranger than we can imagine.

The power of mathematics lies in its generality and abstraction.

The mind is a flow of ever-changing experiences.

小孩子們對大人們應該寬厚些，不要埋怨他們。

The beauty of mathematics lies in its ability to reveal the hidden structures of reality.

We need to think beyond the device and focus on the ecosystem it enables.

Happiness is the key to life. Without happiness, you have nothing.

Labor economics is fundamentally about understanding people’s choices and constraints.