natural buffer

• 天然缓冲

natural buffer的用法和样例：

例句

1. Forest canopies serve as natural buffers against wind and rain, and the deep roots of trees help keep the granular soil from shifting.
   林冠是抵御风雨的一道天然缓冲屏障，而深扎在地下的树根可防止土壤颗粒流失。