what goes up when rain comes down

what goes up when rain comes down what goes up and never goes down? What goes up when the rain comes down?同上,这句话的意思和谜底是什么? 一英语谜语 What goes up every time when rain comes down? What goes up when rain comes doen?快,晚了我就完了 英语翻译What always goes up and never goes down?What’s black when it's clean and white when it's dirty? what comes down but never goes up- what goes up but never comes down what goes up must come down What goes up,must come down What always goes up and never goes down? What always goes up and never goes down?是什么意思? What always goes up and never goes down? what goes up but never comes up猜一猜 1.when can you get water with a net?2.what aiways goes up and never goes down?第二题中有一个单词拼写错了,1.when can you get water with a net?2.what always goes up and never goes down?请把问题翻译成汉语,然后给出答案, 英语IQ题：what goes up but never comes down? what comes down,but never goes up?先英翻中再解题 What thing always goes up,and never comes down