This area is particularly vulnerable because it is often prone to mechanical damage but derives no protection from an anode system being above the water line.
此区域特别易受损因为容易产生机械损伤，但是却无法得到吃水线以上的阳极系统的保护。
In the arid area of Northwest China, the whole ecological environment is very vulnerable, and water is an important factor for the sustainment of the oasis ecological environment.
在西北干旱地区，整个生态环境非常脆弱，而水又是维系绿洲区生态环境的重要保证。
In the arid area of Northwest China, the whole ecological environment is very vulnerable, and water is an important factor for the sustainment of the oasis ecological environment.
在西北干旱地区，整个生态环境非常脆弱，而水又是维系绿洲区生态环境的重要保证。
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