extra ·noun (ANOTHER THING)
Definition: something that you can get with something else if you pay a little more money Level: B1
我买车时，额外付钱买了一个附加项目——延保。
When I bought the car, I paid for an ___extra - the extended warranty.
这本书的精装版附带一些赠品，比如地图和海报。
The deluxe edition of the book comes with several ___extras, like maps and a poster.
GPS系统是我决定加到订单里的一个价格不菲的额外配置。
The GPS system was a costly ___extra that I decided to add to my order.