慢速英语:美国人春季为北美野韭疯狂

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black market - n. a system through which things are bought and sold illegally

fry - v. to cook (food) in fat or oil

pickle - v. to preserve (food) with salt water or vinegar

stem - n. the main long and thin part of a plant that rises above the soil and supports the leaves and flowers

vulnerable - adj. open to attack, harm, or damage