penknife
(also `pocket-knife), n (pl -knives) small knife with one or more blades that fold down into the handle, usu carried in the pocket 小摺刀. =>illus at knife 见knife插图.
🗣️ 情景例句
Apply as much force as is necessary.
需用多少力量就用多少。
Perhaps I can sneak out of the classroom unnoticed.
也许我可以神不知鬼不觉地溜进教室。
In the letter he was asked to call at the station.