issue
problem
question
matter
trouble
1.（需回答的題目） question; problem
solve a problem;
解答問題
ask a question
提問題
2.（需研究解決的矛盾等） problem; matter:
the heart of the matter; key to the question; key to the solution of a question;
問題的關鍵
essence of the problem [question];
3.問題的實質
（事故或意外） trouble; mishap; sth. wrong
troubleshooter;
解決麻煩問題的能手
without any mishap;
沒出什麽問題
4.（重要之點） the point; the thing:
That is not the point.
問題不在這裏。