1、The incidental expenses of cars in this city are expensive.
這個城市汽車的附加費用很昂貴。

2、Registering with the Hotel and all room and incidental expenses will be paid upon check-out.
所有的房費和雜費會在我退房時付清。

3、Keep this money for incidental expenses on the way.
你留著這點錢在路上零花吧！

incidental expenses翻譯