十万个冷笑话贞子篇:What are you up to?是什么意思?

What are you up to?是什么意思? “what are you up to ?”和“what are you up for ?”的区别是什么? "what are you up to ?"是什么意思啊 what are you prepare to do? 是 What are you ??? to do What are you up to? 作何解释？为何作此解释？ i want to know what you are ? “what are you prepraing to do”是什么意思？ What can I do to make it up to you ？ What have you been up to?什么意思？