Definition: something that you can get with something else if you pay a little more money Level: B1
导航系统是这款新车型的可选额外配置。
The navigation system is an optional ___extra on the new car model.
这张特别版DVD附带了许多有趣的额外花絮。
The special edition DVD comes with many interesting ___extras.
我们支付了一小笔费用，以获得带海景房间的额外享受。
We paid a small fee for the ___extra of a room with an ocean view.
