Two or more folds parallel to each other with adjacent folds in opposite directions, resembling the bellows of an accordion. Alternative term: fanfold.

两个(以上)平行摺以不同边方式连，手风琴腔。

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.

那时候，一个设计飞机机翼工程师会把一大堆穿孔卡片交给电脑，等上一个星期才能拿回来成千上万数字，而且是写在复写纸上。