它们难分彼此，交相辉映。

所有人类行为都有以下七个原因中的一个或多个：机会、自然、强迫、习惯、理性、激情和欲望。

证据似乎支持病毒的基本结构是一个空心管的观点。

Collaboration across industries is key to solving the complex energy challenges we face.

Innovation is at the heart of what we do. It's how we meet the world's growing energy needs while reducing our environmental footprint.

文学的目的是将血液转化为墨水。

Look at a day when you are supremely satisfied at the end. It's not a day when you lounge around doing nothing; it's a day you've had everything to do and you've done it.