弦理论的景观是广阔而复杂的，可能有10^500个不同的可能宇宙。

The state, therefore, has not existed from all eternity. There have been societies that did without it, that had no notion of the state or state power. At a certain stage of economic development, which was necessarily bound up with the split of society into classes, the state became a necessity.

Innovation in natural gas extraction is key to meeting the world's growing energy demands while reducing environmental impact.

每一次科学发现都是对自然界的一次新的对话，它让我们更接近宇宙的奥秘。

Believe you can and you're halfway there.