What is the point of discussing this issue further?
这件事再讨论下去有什么意义呢?

10.
I believe it’ll play an important part in the realization of China’s modernization program.

11.
I’ll say. You know we should try to stay in touch.
stay/ keep in touch 保持联系
get in touch(with sb) 取得联系
lose touch (with sb) 失去联系
e.g. Have you got in touch with your friend that you met in New York?
I always keep in touch with my friends by e-mail.
We had stayed in touch these years, but we lost touch since he moved to America last year.

12.
I have every intention of doing that.
every adj.一切可能的
e.g. She made every attempt. 她尽一切努力。
There is every appearance of snow. 看来是一定要下雪了。
He was given every chance to get the post.
他得到一切可能的机会去获得这个职位。
intention n.意图, 目的
e.g. What is his intention do you think when he told us about the secret of his family?
His intention is very apparent.
Do you have the intention to attend the meeting next month?