数学是一门活生生的学科，不断演变和发展。
Mathematics is a living subject, constantly evolving and growing.
我们不是从祖先那里继承了土地；我们是从子孙那里借来的。
I'm the kinda guy that's mental, if I smack a chick in the mouth, she'd be like, "Damn, that shit was intense!"
我们不必如此努力。