I've got to tell you that I realized fairly late in life they are more subtle than I imagined the first time.
我得告诉你们,我是很晚的时候才意识到,它其实比我之前想象的要精妙得多
耶鲁公开课 - 基础物理课程节选
应用推荐
模块上移
模块下移
不移动