In quantum mechanics, the act of measurement can change the state of the system being measured.
历史中的优点似乎有三种,一种是来自气候和国家的纯粹地理位置,一种是来自政府形式和人民性格,一种是来自那些更细致的哲学原则和道德,可以称为哲学的推荐。
The best ideas often come from the front-line employees who face challenges every day.
The best art education is teaching students how to see.
"I think of painting as a kind of silent music."