Drone safety is not an option, but a baseline.

The work of art is a seed of the future.

Out of my own great woe I make my little songs.

最可持续的皮革是使用寿命最长的皮革，减少了频繁更换的需求。

The difference between theory and practice is that in theory, there is no difference between theory and practice, but in practice, there is.

骄矜自大，独断专行，招祸之源。

The best way to predict the future is to invent it.

释义：人性都是怕死而追逐利益，这是天下共通之理。