active functions

• 积极作用

active functions的用法和样例：

例句

1. All these measures have played active roles in improving China's ecological environment.
   这些措施对于改善中国的生态环境起到了积极作用。
2. The establishment of national parks plays an active role in environmental protection.
   国家公园的建立为生态保护起到了积极作用。