It took thousands of American field reports from Afghanistan and extracted information on those involving “improvised explosive devices” (IEDs).

他们先是阅读了数千份驻阿富汗美军的战地报告，然后将其中涉及简易爆炸装置（IEDs）的信息中过滤出来。

The simple but effective design of the bombs, which may have cost as little as $100 to make, is similar to countless improvised explosive devices (IEDs) that have inflicted casualties on civilians and Western troops in Afghanistan and Iraq.

这些炸弹制作简单、杀伤力强，成本也许只有100美元。它们与数不胜数的简单爆炸装置（improvised explosive devices, 简称IED）类似，这种简单爆炸装置已使普通百姓，以及驻守阿富汗和伊拉克的西方联军遭受种种伤亡。