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汉语拼音：shí wù liàn

生物群落中各种动植物和其他生物彼此之间由于摄食关系所形成的一种联系。如小鱼吃浮游生物，大鱼吃小鱼，人吃鱼，形成一种包含几个环节的食物链。生命的发生和发展是通过食物链的能量流动和营养物质的交换为其条件的。

1. 乙种生物吃甲种生物，丙种生物吃乙种生物，丁种生物又吃丙种生物……这种一连串的食与被食的关系，叫做“食物链”。草食动物吃緑色植物，肉食动物吃草食动物，是最基本的食物链。也叫营养链。

   《人民日报》1981.4.27：“在自然界，千千万万种生物为了繁衍后代，既互相依存，又互相制约，组成一条环环相扣的‘食物链’。”

• Contaminated food has been found a disconcertingly long way away, although it seems to be being kept out of the food chain.

  人们在远方发现了受污染的食物，其与核电站相距之远令人不安，不过这些食物看起来被排除在了食物链以外。

• Planktonic algae are at the bottom of the food chain. If more of them are around, the rest of that chain will be affected.

  浮游藻类位于食物链的底层，假如它们的数量增多，那食物链的其它部分将会受到影响。

• Nutrient production would occur closer to the surface, promoting a food chain benefiting different species, as they migrate farther north.

  养分的产生将越发接近海平面，促进食物链惠及不同的物种，因为它们往北迁移。

• And that's the difference between a PCB and, say, something natural like an omega-3, something we want out of the marine food chain.

  这与PCB分子是不同的，可以说，就像ω-3脂肪酸一样天然，我们希望海洋食物链里有这些东西。

• However there is no need to tell the consumer if GM has been used further back in the food chain.

  然而，并不需要告诉消费者转基因是否更早的时候已经被用于食物链中。

• The mercury ascends the food chain up to the Yanomami in the form of a neurotoxin that especially affects child development.

  水银下楼到雅诺马马食物链的形式，尤其是影响儿童神经发展。

• Experts believe that melamine as pesticides , fertilizers and containers entering the human food chain, but it should be "very low. "

  专家认为，三聚氰胺会随着农药、肥料和容器，进入人类食物链，但应该是“极微量”。

• So if you know that the service is static and won't change, then you could climb one more level up the abstraction food chain.

  因此如果您知道服务是静态的，并且不会变化，那么您就可以在抽象的食物链上再上升一层。

• As an employee, you may be used to passing problems up along the food chain or not be very involved in decision making.

  一名打工者，你或许习惯在食物链内推卸责任，或不涉及决策的工作。