involving or relating to an attack using living matter, such as bacteria, to harm or kill people for political reasons

Until recently, bioterrorist attacks were considered unlikely. 直到最近，生物恐怖袭击都被认为是不太可能的。

Law enforcement authorities are often caught by surprise when it comes to bioterrorist threats. 对于任何生物恐怖主义的威胁，执法当局往往措手不及。

someone who uses living matter, such as bacteria, in an attack in order to harm or kill people for political reasons

The bacteria could be spread by bioterrorists through the air. 这种细菌可能会被生物恐怖分子用来通过空气传播。

Officials said the bioterrorist may have had a science background. 官员们说，该生物恐怖分子可能有科学背景。