What is it when once lost,you can never find it again?

What is it when once lost,you can never find it again? What is it when once lost,you can never find it again? what is it that when once lost,you can never find again? What is it that when once lost,you can never arrives? What is it that when once lost ,you have never find again? 同问 what is it that when once lost,you can never find again?谜 what is it that when once lost,you can never find again?谜底 what is it that,when once lost you can ever find again? 英语谜语 请大家帮忙猜一下 what is it that when once lost ,you can never find again? 2.what is it,when once lost,you can never find again?1.what can you see with your eyes shut? it is clean when it is black.it is dirty when itis white.what is it 帮我解英语益智题What man cannot be in a warm house?What is black when it is clean but white when it is dirty?Why do people frrl stronger on Sundays?What can be found once every minute,twice every moment,but not once ina thousand year?There is what is white when it is dirty 猜猜what是什么 What is it?When once lose,you can never find again.急回一楼：回二楼：你有病~一楼的，9你了 what time is it 与when is it 的区别 It is clean when it is black.It is clean when it is black.It is dirty when it is white.what's it? 猜谜语：It is clean when it is black.It is dirty when it is white.What's it 智力测试What is black when it is clean and white when it is dirty?