“您90多岁了还坚持工作，您的动力来自哪里？您的初心是什么？”洛阳一群“90后”青年看望陈俊武时问道。

系统的稳定性取决于开环传递函数在复平面上的行为。

Waste is a design flaw, and it's our job to fix it.

Everything's not lost.

I always try to push the boundaries of what is possible in film.

When someone is nasty， rude， hateful， or mean with you， pretend they have a disease. That makes it easier to have empathy toward them which can soften the conflict.

Pain is temporary, but pride is forever.