ad spending的用法和样例：
例句
- Many Chinese companies' efforts to build brands of their own are also fuelling ad spending.
许多中国公司努力创建自有品牌，这也推动了广告支出。 - We already know that financial-services companies, the biggest buyers of paid-search and online ads, have cut back their online ad spending as a result of the housing crunch.
众所周知，作为付费搜索和在线广告最大买主的金融服务公司，由于房市的崩盘而削减了在线广告支出。
