A biological weapon could infect millions of people with a deadly disease.

生物武器可以让数百万人感染致命疾病。

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"No shrewd user" of a biological weapon "is going to give you that opportunity," he warned.

“没有一个精明的生物武器使用者会给你那个机会，”他警告说。

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Since 911, fears of shoulder-fired missile2 and biological weapon attacks have increased.

自911事件以来，对于肩射飞弹及生物武器等攻击行动的恐惧不断增高。

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"I think that the biggest strategic threat to the United States faces today is the possibility of another 9/11 with a nuclear weapon or a biological agent of some kind."

VOA: standard.2010.02.14

During the invasion, we wore chemical protective suits because of the fear of chemical or biological weapon attack.

WSJ: Ryan Smith: The Reality That Awaits Women in Combat

It's okay for chemical weapons it's okay for biological weapon at the toxin and bacteriological, but not the viral.

CENTERFORSECURITYPOLICY: Remarks to the Council on Foreign Relations

It was concerned terrorists would use the details to develop a biological weapon.

BBC: Controversial bird flu work resumes