They were dressed in camouflage and carried automatic rifles.

他们身着迷彩服，手持自动步枪。

《柯林斯英汉双解大词典》

I saw no automatic rifles, and residents greeted me as I passed them in the narrow alleys, while dogs and cats lounged on cement platforms and rooftops.

我没有看见一把自动步枪，在狭窄的小巷里遇见本地居民时，他们总是和我打招呼。狗啊猫啊的栖息在水泥平台上或者屋顶上。

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Characteristic of all assault rifles, a selector level allows the shooter to choose between automatic (continuous firing) and semi-automatic (single-shot firing).

突击步枪共有的特点是，分配器手柄可以让射手在全自动(连续发射)和半自动(单发发射)之间进行选择。

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Likewise, the .223 ammunition used in popular semi-automatic rifles is hard to find.

WSJ: Laws, rumors have ammo flying off store shelves

It would strain logic and common sense to conclude that the Second Amendment protects semi-automatic handguns but does not protect semi-automatic rifles.

FORBES: Liberal Courts Still Gunning Against Second Amendment Rights

In particular, opponents contend the proposed ban on semi-automatic rifles focuses on a weapon used in a tiny percentage of killings and other gun violence.

CNN: STORY HIGHLIGHTS