被动式中的by是什么意思,这个意思应该是通用的吧 如the paper is invented by chinese

被动式中的by是什么意思,这个意思应该是通用的吧 如the paper is invented by chinese paper was invented by chinese. 这个阅读理解Paper was invented by the Chinese in the first century The paper was invented many c_______ ago by ancient Chinese. _The___abacus was invented by Chinese centuries 为什么填the? Paper was invented by a Chinese man called CAI LUN in AD 105 初一英语阅读paper was first invented by a chinese man called Cai L 一道完形填空.紧急!Paper was first invented by a Chinese man called C do you know whom the radio is invented by 这个句子对吗? As is recorded in history,paper was first invented by Cai Lu “Chinese people invented paper.”的中文是什么? pie plate的意思（在这句话里：The pie plate was invented by accident