对...意味著...是mean...to...还是 mean...for...

对...意味著...是mean...to...还是 mean...for... mean for what's mean对还是what mean对? Why is he so mean to us还是why he is so mean to us哪个是对的?请解释一下相 这对我意义重大,怎么说?是it's mean a lot of me 还是 it's mean a lot to me mean to 意思不同是mean different things还是mean different? Mean 用mean to do 还是doing I didn't mean for it to happen,这里的for是干嘛的? mean sth for what's that mean?对还是what does that mean对啊?