water proofing

Have you got any proof that you own this bike？（英译中)

Please choose a correct name for “消防泵”.A.fire maskB.fire proof lineC.fire pump

零知识证明（zero－knowledge proof)，是由Goldwasser等人在20世纪80年代初提出的。它指的是（)能

The fact that different languages have different words for the same object is good proof t

【C2】A．causesB．casesC．factorsD．proofs

So far there is no proof______people from other p