英语词汇jumping bean的起源、历史背景-英语词源词典

jumping bean; jumping cactus. The seed of certain Mexican plants of the genus Sapium and Sebastiana that jump or move about because of the movements of a moth larva inside the seed. Jumping bean and Mexican jumping bean are American- isms first recorded in about 1885. Jumping cactus, which en- tered the language at about the same time, refers to the cholla cactus of the Southwest, so named because when the loose stems on the ground are touched the entire plant may move, and/or because it aggressively shoots its needles at people who come too close.

词汇	jumping bean
词源	jumping bean; jumping cactus. The seed of certain Mexican plants of the genus Sapium and Sebastiana that jump or move about because of the movements of a moth larva inside the seed. Jumping bean and Mexican jumping bean are American- isms first recorded in about 1885. Jumping cactus, which en- tered the language at about the same time, refers to the cholla cactus of the Southwest, so named because when the loose stems on the ground are touched the entire plant may move, and/or because it aggressively shoots its needles at people who come too close.
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