How many roads must a man walk down before you call him a man?

"Books are the seeds of imagination."

When buying a garden hose， an extension cord， or a ladder， get one substantially longer than you think you need. It’ll be the right size.

It is remarkable that a science which began with the consideration of games of chance should have become the most important object of human knowledge.

目的的概念在行为的科学解释中没有位置。

最终，任何技术的成功都取决于它解决现实世界问题的能力。