jì / lù / piàn / jiè / shào / le / zhà / dàn / zhī / mǔ / de / shè / jì / hé / shǐ / yòng / bèi / jǐng

纪录片介绍了炸弹之母的设计和使用背景。

The documentary introduced the design and background of the Mother of All Bombs.