also switch-blade, type of folding pocket knife, 1932, from switch (n.) + blade. So called for the "switch" which is pressed to spring the knife open. Earlier a similar tool was known as an Arkansas toothpick (1837) and a clasp-knife (1755).
实用例句
1. Lenny swayed for a moment, then dropped to the ground, impaling himself on his switchblade.
伦尼晃了一下，然后倒在了地上，他的弹簧刀刺穿了自己的身体。
来自柯林斯例句
2. Fought like a switchblade so no one could take him down.
打架像刀锋一样锐利,没有一个人能把他打倒.
来自互联网
3. Just give him your money. He's got a switchblade.
把你的钱给他, 他带着弹簧刀呢.
来自互联网
4. A deadly weapon, such as a firearm or switchblade.
