1. Medicare could save hundreds of millions of dollars a year if everyone used the cheaper drug, Avastin, instead of the costlier one, Lucentis. 如果每个人都使用更便宜的药物安维汀，而不是更昂贵的雷珠单抗，那么医疗保障每年就可以节省数亿美元。
2. But low-expansion glass is much costlier than soda-lime glass. 但是低膨胀的玻璃比碱石灰玻璃可贵多了。
3. The more code you have, the costlier it will be to add anything new. 你拥有的代码越多，添加新内容所要付出的成本就越高。
4. Both tasks turned out to be harder and costlier than Rolls-Royce thought. 后来证明，两项任务比劳斯莱斯所设想的要更难更费钱。
5. Though costlier, xenon allows a discharge lamp to start far more quickly. 尽管成本高，氙气能够迅速启动发电灯管。
