我的语言的界限意味着我的世界的界限。
No matter how complex or refined, all behavior is to be explained in terms of stimulus and response.
I'm interested in the way that women are perceived and how they perceive themselves.
The bond market is the most important market in the world.
永远不要停止学习，因为世界永远不会停止变化。
The discovery of 51 Pegasi b was a turning point in astronomy, proving that planets could exist around sun-like stars.