trouble/ 'tr^bl /

1.noun [c/u] 
(difficulties,bother,effort) 麻烦

2.noun [s] 
(problem) 问题

3.noun [u] 
(unrest) 骚乱

4.vt.
(worry) 使担忧

5.vt.
(disturb) 打扰

6.vi.
to trouble to do sth 费心做某事

7.n pl
troubles 忧虑

to be in trouble
惹麻烦
8.n pl [ship] [ climber etc+] 
陷入困境

to have trouble doing sth
做某事有困难
what's the trouble?
怎么了?
the trouble is...
问题是…
stomach/back trouble
胃部/背部毛病
it's no trouble!
没问题!
to go to the trouble of doing sth, take the trouble to do sth
不辞劳苦地做某事
please don't trouble yourself
不麻烦您了