low-lying wet land with grassy vegetation; usually is a transition zone between land and water;
"thousands of acres of marshland"
"the fens of eastern England"
双语例句
1. Areas that are naturally at exactly sea-level are always coloured blue regardless, that's why this map of England's fen-land is peppered with blue, even at + 0m: fenland at + 0m.
当然低于海平面的地区总是蓝色，这就是为什么即使是在+0m的时候英格兰的沼泽地也会有零星的蓝点。
youdao
2. Areas that are naturally at exactly sea-level are always coloured blue regardless, that's why this map of England's fen-land is peppered with blue, even at + 0m: fenland at + 0m.
