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.