The relationship between wages and employment is not as straightforward as some models suggest.
光就是一切。它定义形式,创造空间,并赋予画作生命。
"History is the present projected backwards."
可持续发展不是一种选择;它是能源未来的必要条件。
成功就是能够从一个失败走向另一个失败而不丧失热情。