他是个左撇子，但用手机时却能用右手熟练地滑动屏幕。

He's left-handed, but he's a skilled right-handed ___swiper when using his phone.

请将卡片插入卡槽完成支付。

Please insert your card into the ___slot to complete the payment.

那个小偷在拥挤的公交车上偷走了我的钱包。

The ___swiper stole my wallet on the crowded bus.