英语词汇balsa rafts的起源、历史背景-英语词源词典

词汇	balsa rafts
词源	balsa rafts. Spanish sailors off South America in the 16th century gave the name balsa, meaning “float,” to the rafts lashed together with vines that the natives used. They later applied the same name to the tree logs, half the weight of cork, that made the rafts so buoyant. That the rafts make even better boats than the Spaniards expected was demonstrated by Thor Heyerdahl centuries later, when he sailed from South America to Poly- nesia on a balsa raft.
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