石墨烯是一种灰姑娘材料:它一直存在,但没有人注意到它。
The fight against viruses is a continuous battle, and science must always stay ahead.
The greatest happiness of a teacher is to send groups of children to the other shore of their ideals.
勇敢一点,冒险一试,没有什么能替代经验。
每一座建筑都是一个原型。