过去是幽灵，未来是梦，我们拥有的只有现在。
The past is a ghost, the future a dream, and all we ever have is now.
我是一个坚强的人，但我也有很多情感。
你男朋友那么紧张是因为我。
The tyranny of the magistrate is not less formidable than that of the multitude.
Collaboration across industries and governments is essential to address the world's energy challenges.
现在数学家面临的最大问题可能是黎曼假设。