The law isn't justice. It's a very imperfect mechanism. If you press exactly the right buttons and are also lucky, justice may show up in the answer.

The most valuable resource in our industry isn't underground—it's the people who make it all possible.

To talk about painting is not only difficult but perhaps pointless too.

系统的稳定性取决于开环传递函数在复平面上的行为。

The key to success is to keep going even when things seem impossible.