你愿意在午餐中讨论这件亊情吗？
Would you like to discuss the matter over lunch?

For example:
A: Would you like to discuss the matter over lunch?
你愿意在午餐中讨论这件事情吗？
B: Sure.当然。

你推荐什么呢？
What do you recommend?

For example:
A: What do you recommend?你推荐什么呢？
B: Everything's is good.什么都可以。

我们讨论正事吧。
Let's talk business.

For example:
A: Let's talk business.我们讨论正事吧。
B: Where shall we begin? 我们从哪里开始呢？

不要空着肚子谈生意。
Never talk business on an empty stomach.

For example:
A: Let's break for lunch now.我们休息一会儿吃午餐吧？
B: That's a good idea. Never talk business on an empty stomach.
好主意，不要空着肚子谈生意。

你喜欢中餐还是西餐？
Do you prefer Chinese or Western food?

For example:
A: Do you prefer Chinese or Western food?
你喜欢中餐还是西餐？
B: Either one is OK with me.都可以。

这是我们招待贵宾的传统座位。
This is our traditional seat for the guest of honor.

For example:
A: This is our traditional seat for the guest of honor.
这是我们招待贵宾的传统座位。
B: It's my honor to be given so much attention.
受此殊荣我十分荣幸。

入乡随俗。
When you are in Rome, do as the Roman do.

For example:
A: Do you like to use the chopsticks or the fork and knife?
您喜欢用筷子还是刀叉？
B: When you are in Rome, do as the Roman do. I'd take the chop-sticks.
入乡随俗，我想用筷子。

为何我们不休息一会儿，下午再回到这边呢？
Why don't we take a break and come back to this in the afternoon?

我想要回到我们刚才讨论的话题。
I'd like to get back to what we were talking about.