Certification standards are meaningless without rigorous enforcement.
没有严格的执行，认证标准就毫无意义。
The Langlands program is a challenge to the boundaries of human knowledge.
我不喜欢被仅仅标记为一件事。
The most beautiful as well as the most ugly inclinations of man are not part of a fixed biologically given nature, but result from the social process which creates man.
在化学工业中，安全不是一个部门，而是一种文化。