In the old days, a designer working on an airplane wing handed a bunch of punch cards to the computer operator and waited a week to get back thousands of numbers on fanfold paper.

那，个设计飞机机翼的工程师会把大堆穿孔卡片交电脑操作员，等上个星期才能拿回来成千上万的，且是写在复写纸上的。