Graphene is a kind of Cinderella material: it was there all along, but nobody noticed it.
石墨烯是一种灰姑娘材料:它一直存在,但没有人注意到它。
Emotions are biological signals that prepare the organism for action.
"The words we use are like the clothes we wear. They can make us look smart or silly, kind or cruel, strong or weak."