but it it's very hard to prove the things that no one can see or _英语解答

but it it's very hard to prove the things that no one can see or measure的翻译

人气：309 ℃　时间：2020-04-12 22:31:47

解答

要证明一件没有人亲自看过或者衡量过的事情是非常困难的.