英语，请慢用怎么说

Please take your time.
请慢用。

Here you are. Help yourself.
来了。请慢用。

Mr. Ch'u, Mr. Tung, please take your time.I'll go first.
褚先生，董先生，请慢用，我先走一步。

This is your appetizer and this is your steak, please enjoy your meal.
这是为您准备的冷盘和牛排，请慢用。

就说：Please就可以了。

因为，如果你说：Please enjoy your water有点太郑重其事了。

而且水有什么好enjoy的？

enjoy yourself!

Please enjoy your meal.

Please help yourself and take your time~~