Sure. Of course.--比较熟的人之间可以这样说,简洁. You're welcome. Don't mention it. At your service. It's my pleasure. My pleasure.-- 这些就比较正式. Not at all. That's OK. That's all right.-- 这个小时候也学过.
Sure. Of course.--比较熟的人之间可以这样说,简洁. You're welcome. Don't mention it. At your service. It's my pleasure. My pleasure.-- 这些就比较正式. Not at all. That's OK. That's all right.-- 这个小时候也学过.