These bacteria actually combine the hydrogen sulfide with the carbon dioxide and this chemical reaction is what produces organic material which is the food for larger organisms.
这些细菌实际上就是硫化氢和二氧化碳的结合体，而这种化学反应产生的有机物质是更大的有机体的食物。
2
But the purple pitcher plant, which lives in bogs and infertile sandy soils in North America, enlists other organisms to process its food.
但是这种紫色的猪笼草，生活在北美的沼泽和贫瘠的沙质土壤中，吸收其他生物来作为它的食物。
3
They replaced other minute organisms as a food source in the major marine food chain.