model for trees

• 树木建模

model for trees的用法和样例：

例句

1. And Oregon, "The Beaver State," borrows its nickname from the large, flat-tailed rodent that uses trees to build dams.
   俄勒冈州，也成为河狸之州，从一种用树木建大坝的大尾巴啮齿动物得来的。