N-COUNT A penknife is a small knife with a blade that folds back into the handle. 小折刀
He had a penknife with a spike for getting stones from a horse's hoof, and I helped him to carve my initials.
他有一把用来从马蹄上取石头的带钉小刀，我帮他刻上了我名字的首字母。
The Russian guards were interested in my wedding ring and took away the roubles that I had, and also my belt, my penknife and my watch.
俄罗斯警卫对我的婚戒很感兴趣，抢了我的卢布，还有我的腰带、小刀和手表。
Even the railroads seem only scratched in with a penknife.
就连铁路似乎也只是用铅笔刀划开的。
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