1. I began to turn round to see what he was looking at and at the same moment, the outside bank guard, the one with the machine gun, came flying through the door and lay face down on the floor.
    紧随其后进门的是三个着实令人恐惧的人，他们头上都带着让人恐怖的面罩，还带着枪；至少最前面的一个拿着一支手枪。

2. In 1871, American inventor Ives McGaffey realized that if you turned an air pump (气泵) the opposite way, you would have a machine that could pick up dirt.
    1871年，美国发明家艾夫斯·麦加菲意识到,如果将气泵的转动反个向,它就会变成一台能吸起灰尘的机器。