提高听力同时，你还可以了解到美国历史上的一些重要事件。请感兴趣的你一听为快吧！
American industry focused on the war effort. Women built many of the 300,000 aircraft, 5,000 cargo ships, and 86,000 tanks while the men became soldiers. The United States fought with Britain and the Soviet Union against the German Nazi threat in Europe. From the time that Germany and the Soviet Union invaded Poland in 1939 (Germany invaded the Soviet Union in 1941) until the German surrender in 1945, millions of people died. Millions more were killed in the Holocaust, the Nazi regime’s mass murder of Jews and other groups. Fighting continued in Asia and the Pacific Ocean even after the war ended in Europe. These battles were among the bloodiest for American forces.
美国工业将注意力集中在了战争上。男人们在前线重逢陷阵，女人们则在后方制作了多达30万架的飞机、5000多艘的货船和86000辆的坦克。美国联合英国和苏联共同对抗欧洲的纳粹德国。从1939年德国和苏联侵占波兰（德国在1941年侵占苏联）到1945年德国投降，数百万人死于非命。更有数百万人死于纳粹党组织的大屠杀，这些屠杀主要针对犹太人，当然还有一些非犹太人有遭到屠杀。在欧洲战场结束战事以后，亚洲和太平洋地区仍然坚持作战。这些战争也成为美国历史上最血腥的战事。