我的声音是我的武器、盾牌和庇护所。

The political liberty of the subject is a tranquility of mind arising from the opinion each person has of his safety.

I always try to be positive, even in tough moments.

By used books. They have the same words as the new ones. Also libraries.

"The value of a thought lies in its functional efficacy."

我们要坚持自主研发，掌握核心技术。