I think that is about as far as we can go.

　　我想就到此为止吧。

　　结束会议：

　　Let's leave it there for today.

　　我们今天就谈到这儿吧。

　　I am afraid we will have to stop here.

　　恐怕我们得到此为止了。

　　Why don't we finish for the day?

　　今天我们就到此为止吧?

　　It has been a very fruitful discussion.

　　这是一次富有成效的讨论。

　　教对会议进行肯定评价：

　　It has been a very useful discussion.

　　这是一次非常有用的讨论。

　　it has been a very productive discussion.

　　这是一次非常富有成效的讨论。