恐怖行为
the calculated use of violence (or threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear
同义词： terrorism / terrorist act
Was this an act of terrorism?
她的行为是恐怖行动吗？
Then I saw another plane fly into the South Tower and I realized that I was witnessing an act of terrorism.
接着我看到了另外一个飞机冲进了南塔，我意识到我正目睹了一次恐怖行动。
IT WOULD seem to be a sensible step: following a tragic act of terrorism, a state passes new anti-terrorism laws.
当一个国家遭遇到不幸的恐怖事件后，它通过了新的反恐法律，这看来很合理。
This week,a car bomb in Peshawar was the country's single deadliest act of terrorism since 2007.
VOA : standard.2009.10.30
"It is a very strong statement,". "If you come here with a view to committing an act of terrorism you are likely to be caught."
VOA : standard.2009.10.17
He says finding that out will be crucial. "Whether this was an act of terrorism conducted by al-Qaida central or that of a lone wolf acting independently, we will have to wait and see for the investigation and what comes out of that, but we do know that al-Qaida and their affiliates have a crazed obsession in targeting the aviation industry,"
VOA : standard.2009.12.27
Federal investigators say they have no indication that the shooting was an act of terrorism.
"Any time bombs are used to target civilians, it is an act of terrorism, " Obama said.
CNN: Obama has learned tough lessons on using the word 'terror'
And he reiterated that Yemeni investigators believe that the attack was an orchestrated act of terrorism.