道德必须指导制药行业的每一个决策。

"Every city has a sex and an age which have nothing to do with demography."

"The world is a text, and we are all its readers and writers."

The PAC learning framework provides a formal way to quantify the learnability of a concept class.

爱是宇宙中最强大的力量。

小说是生命的一本明亮的书。

道的法则本是无为而自然，似有似无，玄妙难测。