爷爷从口袋里掏出他的小折刀削苹果。

Grandpa took his pocketknife out of his pocket to peel the apple.

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Grandpa took his pocketknife out of his pocket to peel the apple.

pocketknife 是复合名词,由 pocket(口袋)和 knife(刀)组成,字面意思是"口袋里的刀",指可以折叠起来方便随身携带的小刀,即"折刀"或"小折刀"。

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