| 释义 |
marshHmB:F, $mB:rFnground, esp. near a lake, river or the sea, that tends to flood and is always wet沼泽地，潮湿地At the mouth of the river is a large area of marsh. [U]河口处是大片沼泽地。This marsh supports a wide range of plants which need wet conditions. [C]这片沼泽地为需要潮湿环境的许多种植物提供了良好的生长条件。Rain was falling fairly steadily and most of the ground had become a marsh. [C]雨不停地下，多数地方已成为一片沼泽。Marsh gas is a gas produced in marshes by decaying plants that are covered by water.沼气Marsh gas consists mainly of methane.沼气主要由甲烷构成。
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