不同类型的颗粒-包括显微藻类，其他浮游生物和周边陆地地区的腐殖质-不断沉积在湖底。
Particles of different kinds - including microscopic algae, other plankton and humus from surrounding land areas - are continuously deposited on lake bottoms.
埃克斯穆尔高地和皮克区等风景区中的泥潭沼泽自古以来都利用其古老的腐殖质沉积层储存了大量二氧化碳。
Peatlands in beauty spots like Exmoor and the Peak District store carbon dioxide in ancient deposits of rotted vegetation.
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