a chemical-weapons attack的意思|示意

This apparently walks back from a Bush-era declaration that underscored the possibility that the United States might use nuclear weapons if it suffered a chemical or biological attack.

这显然是走回布什时代的宣言，强调了美国可能会使用核武器如果它受到了化学或生物武器的袭击的可能性。

According to recent studies, a caterpillar can sense when a plant is about to unleash its chemical weapons and counter by producing anti-toxins to neutralize the plant's attack.

据最新研究表明，毛毛虫可以感应植物何时准备释放“化学武器”，而分泌有毒物质抗体，与植物抗衡。

Ten people packed into a sweltering bunker near the Iraqi border seconds after a chemical weapons attack, looking for direction on what to do next, and who was in charge?

在遭到化学武器袭击后我们十个人马上就挤在伊拉克边缘地区的一个蒸笼般的掩体里。下一步应该怎样做呢？谁会成为领导人呢？

According to recent studies, a caterpillar can sense when a plant is about to unleash its chemical weapons and counter act by producing anti-toxins to neutralize the plant's attack.

据最新研究表明，毛毛虫可以感应植物何时准备释放“化学武器”，而分泌有毒物质抗体，与植物抗衡。