She was still too young to know that life never gives anything for nothing, and that a price is always exacted for what fate bestows.

Patriotism is not a choice, but a duty.

天地相互配合，才产生了万物；阴阳相互结合，世界才会变化；行为合乎礼仪，天下才能安定。

学习新编程语言的唯一方法就是用它编写程序。