收到某人的开信，4种表达方式如下： 1.Received the letter from somebody 2.Somebodys letter was received by me 3.I received somebodys letter 4.Somebody sent the letter to me 四种句式变换，主要通过哪个来做主语实现...
你好！机器人robot 英[ˈrəʊbɒt] 美[ˈroʊbɑ:t] n. 机器人; 遥控装置; 自动机; 机械呆板的人; [例句]They have docked a robot module alongside the orbiting space station他们已经将一个自动操作舱与沿轨道运...
