在1874年费迪南德布劳恩是一名24岁的教师在德国莱比锡.In 1874 Ferdinand Braun was a 24 - year old teacher in Leipzig, Germany.冯.布劳恩 ( Wernhervon Braun,1912-1977 ) 是20世纪液体燃料火箭技术和宇航工程的开创者和奠基人.Wernher von Braun ( 1912 - 1977 ) was a romantic person...
We put the dog in kennels when we go away.我们外出时把狗寄养在养狗场。The guard dog was now in kennels as it was not aggressive...这条看门狗不好斗，因此正在养狗场受训。He left his dog in a kennels when he went on holiday.他外出度假时把狗交给养狗场照管.The guard dog wa...