英语翻译通俗地讲,食物链是各种生物通过一系列吃与被吃的关系,把这种生物与那种生物紧密地联系起来.就像老鹰吃小鸟,小鸟吃虫

More simply, the food chain through a series of various biological relationship between eating and being eaten, the creature with the kind of biological closely linked. Eating birds like eagles, birds eat insects, worms can break down the body of an eagle.
Although ecosystem wide range of biological and ecological systems are playing a different role, according to their energy and material movement in the role, can be summarized as producers, consumers and decomposers three categories.
Producers are mainly green plants can manufacture inorganic nutrients, this function is photosynthesis, can also include some of the bacteria.
Consumers are heterotrophic organisms, refers to those in other biological or organic eating animals, they directly or indirectly on plants for food. According to the different feeding habits, can be divided into two major categories of herbivores and carnivores.
Heterotrophic decomposers are organisms, mostly bacteria and fungi in a variety of complex animal and plant residues are broken down into simple compounds the body, and finally broken down into inorganic substances into the environment to return, re-use by producers.