5. I think you've overcharged me.
我認為你多算了我的費用。
還能這樣說：
I think this is more than the real bill.
I don't think I spend so much.
應用解析：
overcharge的意思是：索價過高；使過度充電或裝填；夸張。
例如：It's a poem overcharged with emotions.
這是一首感情過于豐富的詩。
6. Your total is RMB 150.
你需付150元。
還能這樣說：
Your meal is RMB 150.
You should pay RMB 150.
應用解析：
total還可以表示：使完全損壞。
例如：His new car was totaled in the accident.
他的新車在車禍中全毀了。
7. Let's go Dutch.
我們各付各的吧。
還能這樣說：
We each pay our own bill.
We pay separately.
應用解析：
Dutch courage 酒后之勇；
talk to sb. like a Dutch uncle 嚴厲地告誡某人；
do the Dutch 逃走；自殺；
in Dutch 碰到麻煩，處于困境
8. This is my treat.
我請客。
還能這樣說：
I will treat you.
I am buying tonight.
應用解析：
go on a fair treat 進步很快；
stand treat 負責請客的費用；請客；
treat oneself to 舍得（吃、穿等）；
treat of 論述，論及