过去是一个跟随我们的影子，一个困扰我们的幽灵。

The camera is like a weapon; it's dangerous if you don't know how to use it.

"The pursuit of excellence is a never-ending journey."

技术应该服务于人类，而不是支配人类。

Genetically modified technology is an important direction for future agricultural development, we should view it scientifically and rationally.