Doubt is not a pleasant condition， but certainty is an absurd one.

每个生命都是非凡的。

Sustainability must be at the core of every decision we make in the oil and gas industry.

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

不和屯积钱财的人争较财富多少；不和热心仕途的人争较地位高下；不和骄傲自夸的人争较名声大小；不和年轻力壮的人争较仪容风度，不和逞强好胜的人争较胜负高低。