历史课上，老师介绍了奥姆真理教及其在东京地铁发动沙林毒气袭击的经过。
In history class, the teacher explained the Aum Shinrikyo cult and how it carried out a sarin gas attack on the Tokyo subway.
In history class, the teacher explained the Aum Shinrikyo cult and how it carried out a sarin gas attack on the Tokyo subway.