1、
The sweet gum, sour gum, and some Australian eucalyptus trees are gum trees.
甜胶树 、 酸胶树和一些澳大利亚的尤加利树都是产树胶的树.
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2、
The sweet gum gum , and some Australian eucalyptus trees are gum trees.
树和一些澳大利亚的尤加利树都是产树胶的树.
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3、
Any of various trees of the genera Eucalyptus, Liquidambar, or Nyssa that are sources of gum.
各种各样产树胶的桉属植物或枫香树的任意一种.
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