natural barrier

基本解释

And Vietnam has invested in mangrove restoration to rebuild a natural barrier to protect coastlines from flooding.
另外，越南正投资重建红树林，这道自然屏障能在涝灾中保护海岸线。
But conservation efforts in this unique eco-system – which serves as a natural barrier to future cyclones - are inadequate.
但是对这里唯一的生态系统——那些阻挡未来风暴的天然屏障——的保护措施却收效甚微。
With that 5, 000-metre natural barrier behind us, we were steering steeply down towards Sost, Pakistan's most northerly town.
背后是海拔5000米的自然屏障，我们沿着陡峭的山路下坡前往Sost，这是巴基斯坦最北端的市镇。

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