同一元素的原子在质量和性质上是相同的。

悲伤不是一条线，让你无限远离失去。它是一个圆，你会一次又一次回到同一个地方。

Leaders must have the courage to make tough decisions for long-term benefits, even if they are unpopular in the short term.

我是一个作家，而不是一个演说家。

Every chemical process tells a story - our job is to make sure it's a story worth telling.

The poor dream all their lives of getting enough to eat and looking like the rich. And what do the rich dream of? Losing weight and looking like the poor.

过去从未死去，它甚至还没有过去。

每个人的生活都是一部等待被书写的小说。

I find I'm so excited. I can barely sit still or hold a thought in my head. I think it the excitement only a free man can feel, a free man at the start of a long journey whose conclusion is uncertain. I hope I can make it across the border.I hope the Pacific is as blue as it has been in my dreams. I hope to see my friend, and shake his hand. I hope.