质量不是成本；它是一种投资。

The great struggle of the twentieth century between liberalism and totalitarianism ended with the victory of the former.

我们与动物唯一的区别就是我们会搭配饰品。

Collaboration between scientists is key to solving complex problems.

In mathematics, you don't understand things. You just get used to them.

生活中最重要的事情不是利用你的收益，而是避免你的损失。

石化行业必须适应低碳趋势，才能在新时期保持竞争力。