土壤最经常缺乏氮和磷。
Soils are most commonly deficient in nitrogen and phosphorus.
例如，沼泽贫瘠的土壤提供的氮和磷很少，所以肉食植物比那些通过更传统的方式获得这些营养的植物更有优势。
The poor soil of bogs, for example, offers little nitrogen and phosphorus, so carnivorous plants enjoy an advantage over plants that obtain these nutrients by more conventional means.
这些较小的生物体也被从陆地流入的含氮和磷的营养物质所刺激。
These smaller organisms are also stimulated by nitrogen and phosphorous nutrients running off the land.
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