Sustainability isn't an option—it's a necessity for the future of dairy farming.
在科学中最令人兴奋的短语,预示着新发现的,不是“我找到了!”,而是“这很有趣...”
写作是一种勇气,敢于面对自己的内心和世界的真相。
The unexamined life is not worth living.
数学不知道种族或地理界限;对于数学来说,文化世界是一个国家。
I don't think President Bush is doing anything at all about Aids. In fact, I'm not sure he even knows how to spell Aids.