过去永远在那里，但它不是唯一存在的东西。
The past is always there, but it's not the only thing that's there.
科学家们似乎仍未充分理解，所有地球科学都必须为揭示地球早期状态提供证据。
We need to ensure that the Internet remains open and accessible to all.
The most important thing in life is to learn how to give out love, and to let it come in.