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）
🗣️ 情景例句
OK. Thank you.
好 ，谢谢。
Are these books all yours?
这些书全是你的吗？
No, more, about 130 years ago. Most of the slave owners were rich farmers who lived in the south. They wanted to keep their slaves.
不，还要早，大约130年前。大多数奴隶主都是住在南方的富有的农场主。他们想保留自己的奴隶。