mature association

• 成熟群丛

mature association的用法和样例：

例句

1. Viewing a biological association as a system has at least two advantages.
   把一个生物群丛作为一个系统来看到至少有两个好处。
2. The term association has been used throughout by British workers for their floristic units.
   群丛一词始终被英国工作者用做他们的植物区系单位。