Listing 13 shows you how to add a roll-overeffect to your component, so that the component shows a "focus" selection whenever a user rolls over the component.
清单13显示了如何为组件添加滚动效果，当用户滚动到该组件时，它将显示一个“焦点”选择？
2
"Over-praising can have a negative effect," says Phillip.
“过度表扬会产生负面影响。”菲利普说。
3
Now that fiscal policy is back on the table, economists are fighting over the size of the ripple effect.