A proof of a proposition is a process the nature of which is such as to produce in us a belief in that proposition.

The separation of law and morals is a necessary feature of a legal system.

困难坎坷是人们的生活教科书。

数学之美在于它能够连接看似无关的思想。

将传统农业智慧与现代技术结合是成功的关键。

野外的规则是适者生存。你必须强壮、聪明、适应力强才能生存下来。

电影的魅力在于它能够讲述超越语言和文化的故事。