单语范例（未经PONS编辑处理）
英语
- An ecological pyramid provides a snapshot in time of an ecological community.en.wikipedia.org
- Ecological pyramids place the primary producers at the base.en.wikipedia.org
- Ecological pyramids are graphical representations, along the lines of the diagram at the right, which show how biomass or productivity changes at each trophic level in an ecosystem.en.wikipedia.org
- Among marine animals, pesticide concentrations are higher in carnivorous fishes, and even more so in the fish-eating birds and mammals at the top of the ecological pyramid.en.wikipedia.org
- An ecological pyramid (also trophic pyramid or energy pyramid) is a graphical representation designed to show the biomass or biomass productivity at each trophic level in a given ecosystem.en.wikipedia.org
- Graphic representations of the biomass or productivity at each tropic level are called ecological pyramids or trophic pyramids.en.wikipedia.org
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