habit
习惯    

例句：
It was her habit to go for a walk after lunch.
她有饭后散步的习惯。

climb the wall
（因极端忧虑、激动等而）反应激烈

例句：
By the time I got the letter that I was hired, I was ready to climb the wall.
当收到被录用的信时，我欣喜若狂。
 

I didn't mean to.
我不是故意的。 

对话：
A: Oh, my goodness! You stepped on my toes.
B: I'm terribly sorry. I did not mean to. Are you all right?
A: That's OK. I'm fine.
　　　
A：噢，我的天儿！你踩到我的脚上了。
B：非常抱歉。我不是故意的。你没事吧？
A：没事儿，我还可以。