著作权归作者所有。 商业转载请联系作者获得授权，非商业转载请注明出处。 作者：Brian 链接：http://www.zhihu.com/question/19929256/answer/16849942 来源：知乎 Joe Keller and Herbert Deever, partners in a machine shop during the war, turned out defective airplane parts, causing the death