这是最好的时代,这是最坏的时代。
The relation between what we see and what we know is never settled.
The challenge is to make the invisible visible.
科学的真正力量在于它能够在我们追求知识的过程中团结我们。
People, even more than things, have to be restored, revived, reclaimed and redeemed; never throw out anyone.