acacias

n.any of various spiny trees or shrubs of the genus Acacia

1. The Australian landscape is dotted with various species of acacias.
   澳大利亚的景观点缀着各种金合欢树种。
2. Acacias are known for their ability to fix nitrogen in the soil.
   金合欢树以其固氮能力而闻名。
3. Some acacias produce valuable timber and are cultivated commercially.
   一些金合欢树可以产出有价值的木材，因此被商业化种植。