large genus of tropical American trees that yield a bast fiber used for cordage and bark used in tanning; milky juice yields caoutchouc.
树内皮用来做绳索和树皮用来制革在热带美国大;出生橡胶奶汁液。
large genus of tropical American trees that yield a bast fiber used for cordage and bark used in tanning; milky juice yields caoutchouc.
树内皮用来做绳索和树皮用来制革在热带美国大;出生橡胶奶汁液。
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