Imagine if you could do the same with behaviors — if you could just as easily assign behaviors to a table cell, like expand and collapse, highlight or scroll, as you could set its background color.

设想，如果可以这样处理行为——假设您可以像设置其背景颜色那样轻松地将行为分配给一个表的单元格，比如是展开还是折叠，是突出显示还是滚动。

youdao

My layout is fairly simple, a repeating background element, a couple of vertical Spaces (roads) and some horizontal Bridges and a little car which should drive underneath them when you scroll.

我的布局相当简单，重复的背景元素，几个垂直的空间(道路)和一些水平桥梁和一辆小汽车，当你滚动它们应该驱动下面。

youdao