3 `8 z! @1 G0 x5 Wgoogle 了一下找到了: 3 B$ F" N$ X+ A l8 XTo use this feature in your ads, you insert a special piece of code into your ad text. For example, let's say you're running a campaign to advertise your candy store and you have an ad group that promotes your chocolate candy products. The snippet of code that you'll insert in your ad text might look like the following: {KeyWord:Chocolate}. Doing this means that when a keyword can't be inserted in your ad, we'll insert Chocolate instead.