It is still a mystery for

Myster It is still a mystery for Everything is still a mystery,isn't it Still:Your heart is a precious thing,guard it well! It is still a pain of the heart! 如何翻译：One thing it still needs is a name. It is winter.At seven o'clock,it is still d＿.There is a frost. IT IS STILL YOU怎么样 the dog is still a _____,but it looks hungty,please give some food to it It is surprising that he is still a ______ after the war. There is a word.If you take the whole from it ,there is still some left.What is it? Is the dog still a--- it doesn’t move for a long time.----a .这个单词? Is the dog still a--- it doesn’t move for a long time.----a .这个单词? Although mine is a very old car,it still runs veAlthough mine is a very old car,it still runs very well 改成倒装句 AIDS is still out there and it still kills RT 谚语you can put lipstick on a pig,but it is still a 翻译It still is for many is it still meaningful to continue?