People piloting drones and helicopters fight wars against people who use machetes and forty-year old Soviet machine guns; all these tools can kill effectively, and they all exist right now together.

人们驾驶着无人飞机和直升机对那些用着大砍刀和四十年前的苏维埃机械枪开战。所有的这些工具都可以有效地杀人，他们现在都一起存在着。

youdao

Grant moved forty thousand men to a point ten kilometers from Vicksburg. He told the men to put down their guns and take up digging tools.

格兰特将他的四万人带到距维克斯堡十公里之外的一个地方，他告诉士兵们放下手中的枪，拿起撬把。

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He called for sixty thousand warplanes, forty-five thousand tanks and twenty-thousand anti-aircraft guns.

VOA: special.2011.06.30

Forty percent of all firearms purchased in the United States are sold without background checks because the guns aren't purchased from a federally licensed firearms dealer, Nichols said.

CNN: 'Universal background check:' What does it mean?