政府必须合作，如果他们想要打击国际恐怖主义。

Governments must cooperate if they are to fight international ___terrorism.

这次炸弹爆炸是意大利近年来经历的最严重的恐怖主义行为之一。

The bomb explosion was one of the worst acts of ___terrorism that Italy has experienced in recent years.

出于政治目的的暴力使用通常被定义为恐怖主义。

The use of violence for political purposes is often defined as ___terrorism.