Additionally, each slide is also presented by a DIV object.
此外，每个幻灯片也要被一个DIV对象代表。
2
You see here on the desk something that looks like a roller coaster, and I'm going to slide an object from this direction.
你看到桌上，这个看上去像过山车，我准备从这个方向，滑下一个物体。
3
And as I increase the tilt this frictional force will get larger and larger and larger and then there comes a time that the object will start to slide.