请问如果没听明白说的是什么的话,用i can not understand your mean还是用i don't un

用英语说我不明白,是I can't understand 还是 I don't understand 是I can't understand 还是I don't understand? I can't understand.I don't understand.I'm not understand,这三个 请问Sorry,I don`t understand your information 译 中文 I don't understand your words.是什么意思 what's the mean,i don't understand是什么意思 what\'s the mean,i don\'t understand是什么意思 I can't fully understand what you mean "Just because I don't care doesn't mean I don't understand." 请问I don't mean to do i don't understand 英语翻译用 I can't understand 开头