Just as shops can deny service to barefoot customers, restaurants and stores in some states can declare their premises gun-free zones.

就如同许多商店谢绝赤脚顾客进入，某几个州的餐厅和商店也一再重申自己开店的前提就是选择禁枪区。

youdao

She said the Obama administration intends to devote hundreds more agents and more effective equipment to stem gun-running across the border and curb illegal purchases in U.S.gun shops by so-called "straw men" fronting for Mexican criminals.

VOA: standard.2009.03.25

They found a military-style uniform in Lanza's bedroom and handwritten notes containing the addresses of local gun shops.

NPR: Arsenal Of Weapons Found In Newtown Gunman's Home

Pastor pointed out that there are 7, 600 gun shops in the United States within 100 miles of the Mexican border.

CNN: Latin America to hold summit to fight crime

Mexican officials point out that many of those weapons are bought at gun shops just over the border in the United States.

ECONOMIST: Mexico