单词：switchblades
(switchblade 的第三人称 -s形式) n. 弹簧小折刀（按钮式弹簧开启的, 等于switchblade knife）
-s form of switchblade
n. a pocketknife with a blade that springs open at the press of a button
n. a pocketknife with a blade that springs open at the press of a button