同根派生 switchblade knife相关词英汉例句用作名词 (n.)The knife mechanism is essential to any folder.刀具的机械装置对任何折刀都是必须的。The policmen seized the folding knife that was used by the scoundrels.干警缴获了歹徒用来行凶的折刀。switchblade knife更多例句