错的是我 代慧颖:这句话什么意思?there are known knowns,there are also unknown unknows.

这句话什么意思?there are known knowns,there are also unknown unknows.. 这句话什么意思??there are known knowns,there are also unknown unknows.. 这句话什么意思?there are known knowns,there are also unknown unknows. there we are这句话什么意思【不好意思，刚才发错了】 文秘KN中的KN什么意思？ Do as you are told. 这句话什么意思？里面的as当什么意思？谢谢 is there a formalized change mangement methodology?这句话什么意思啊? 急！！！these pipes are suitable for sour services 这句话什么意思？谢谢 all your base are be long tous 这句话什么意思 How much pens are there in your bag?这句话错在哪里？