sponge tree

• 金合欢

sponge tree的用法和样例：

例句

1. Many acacias have exaggerated umbrella-shaped crowns which enable the tree to capture the maximum amount of sunlight, with the smallest possible leaves.
   许多金合欢都长着夸张的伞形树冠，这样植株就能以最少的树叶来获得最多的阳光。