知识只有在分享时才有价值。
化学不仅是一门科学,它是一种看待世界的方式。
时间是小偷,但记忆是说谎者。
The key to success is to keep growing in all areas of life - mental, emotional, spiritual, as well as physical.
The world is a book, and those who do not travel read only one page.