Boko Haram's tactics have changed over time.

博科圣地的策略随着时间不断改变。

youdao

Boko Haram gunmen also shot a police inspector.

武装分子还袭击了一名警察巡查员。

youdao

But the links have not been proved and little is known about groups such as Boko Haram.

但是，链接关系没有得到证实，并且对博科圣地这类组织有所了解的人甚少。

youdao

Sounds of heavy and light machine gun fire rattled Maiduguri as Nigeria's army pounded suspected hideouts of the Islamic rebels in a bid to flush out remnants of the militant Boko Haram sect.

VOA: standard.2009.07.30

His impassioned calls for peace are still relevant in the age of ISIS and Boko Haram.

CNN: Pope Francis' powerful signal to the poor

He is the most senior security official to be killed by Boko Haram so far.

BBC: Boko Haram timeline: From preachers to slave raiders

Boko Haram has previously carried out attacks, including at churches, according to government officials.

CNN: STORY HIGHLIGHTS