数学不是一项观赏性运动；要理解它，必须积极参与其中。

Sustainable development requires balancing economic growth with ecological protection.

You are too generous to trifle with me. If your feelings are still what they were last April, tell me so at once. My affections and wishes are unchanged, but one word from you will silence me on this subject forever.

文学是对抗不宽容和狂热主义的最佳武器。

每部小说都是进入人类心灵未知领域的旅程。

认证是责任林业的语法。

实现明天的唯一限制将是我们今天的疑虑。

网络背后的梦想是一个共同的信息空间，我们通过共享信息进行交流。