可否幫我翻譯以下呢段中文字??唔該=]

Once you parked a car in a wrong place,traffic cops will discover it soon.You are lucky if they do not give you an invoice of penalty.However,this case does not happen usually. Sometimes they are so courteous.

Last time when I was vacationing at Swiss, I saw a note on my car. It states that, "Sir,welcome to our city.It is"No parking"Zone.If you pay more attention to our traffic signal,you will enjoy yourself in our city,please remind that."

If you receive such a polite imploration note, you will certainly be willing to follow the rules.

幫你improve d wordings~
會idiomatic d~

你是用字機直譯的吧! 基本上沒問題, 改少少就可以了!
Once you parked a car in a wrong place,traffic cops will discover it soon.You are so lucky that if they didn't give you a invoice of penalty.However,the case is not usually like that.Sometimes they are so courteous.

Last time I was vacationing at Swiss.I saw a notepaper on my car. It state that"Sir,welcome to our city.Here is"No parking"Zone.If you pay more attention to our traffic signal,you will enjoy yourself in our city,remind please."
You will certainly willing to comply with the rules if you received such polite imploration note.

2007-07-12 20:57:25 補充：
a invoice 應改為an invoice

Once you are parking a car in a wrong places,traffic cops will detect soon.You are so luckly that if they aren't give you a invoices of penalty.However,the case is not usually identical.Sometime they are so courteous.