The matter can wait until the next meeting; it's not urgent.
这件事可以等到下次会议处理, 不是急事.
It's not urgent we can do it next week or whenever.
不是急事--我们可以下星期做或其他时候做.
I'm afraid something urgent has come up; I won't be able to see you tonight.
很抱歉, 有些急事; 今晚不能见你了.