To help you know sort of ahead of time quickly what those views are, I want to start by describing a set of views that many of you probably believe.
让你们稍微提早点儿知道,那些观点是什么,我想要从描述它开始,可能你们有些人会相信。
Incidentally, we have a problem set, which I want you to start today and it will be due not in a week this time, because we have Martin Luther King Day coming up, but it will be due the Monday following that.
顺便说一句,我们有一套习题,我希望你你们从今天就开始做,不要求下个礼拜交,因为马丁·路德·金日要放假,等放完假后的礼拜一交
If that's all it knows, then in that scenario there is no building or anything else; it continues a trajectory both forward in time and backward in time, and it says that whatever seconds, one second before you set your clock to 0, it would've been on the ground.
如果是这样,在那种模式下,没有楼房或者别的什么,物体的运动轨迹可以沿时间可以向后延伸,也可以向前延伸,不管时间取什么值,在零点前一秒时,物体就在地面上
应用推荐