1. And assuming such an automatic messenger picked up our first broadcasts of the 1920´s,
    假定外星人的这种自动化信息装置接收了我们二十世纪二十年代的第一次广播信号，

2. Assuming that his family had been killed during an air raid, Hans settled down in a village fifty miles away where he had remained ever since.
    汉斯以为全家人都在空袭中遇难，于是便在距此50英里外的一座村子里定居下来，直至当日。

3. You can stretch your legs on the spacious decks, play games, meet interesting people and enjoy good food----always assuming, of course, that the sea is calm.
    你可以在甲板上伸展四肢、做游戏，还能也很见到各种有趣的人，能享用各种美味佳肴-当然，这一切只有在大海风平浪静的情况下才有可能。