Insects are fairly low down (on) the food chain.
在食物链中，昆虫是相当低的一级生物。
The whole food chain is affected by the overuse of chemicals in agriculture.
整个食物链因农业中过度使用化学制品而受到影响。
This poses a threat to agriculture and the food chain, and consequently to human health.
这会对农业和食物链造成威胁，由此而危及人的健康。
The effect was to disrupt the food chain, starving many animals and those that preyed on them.
后果是打断食物链，使许多动物和捕食它们的动物饿死。
Sharks are at the top of the food chain in the ocean's ecosystem.
在海洋生态系统中，鲨鱼处于食物链的顶端。
Before eating meals, you should see if you will break a food chain.
吃饭之前，你应该看看自己有没有破坏食物链。
Sometimes one living thing kills another to live, so they form a food chain.
有时一种生物为了生存而杀死另一种生物，所以它们形成了食物链。
Smaller plastic pieces can also enter the food chain and end up in our bodies.
更小的塑料碎片也可以进入食物链，最终留在我们的身体里。
If you see somebody doing something bad for the food chain, please stop him at once.
如果你看到有人对食物链造成不利影响，请立即阻止他。
Many believe that sharks can never be endangered because they are the strongest in their food chain.
许多人认为鲨鱼永远不会濒临灭绝，因为它们是食物链中最强的。
Scientists hope they can turn things around for this important apex predator, meaning one that is on top of the food chain.
科学家们希望他们为这种重要的顶级捕食者——处于食物链顶端的捕食者扭转局面。
Humans are at the top of the food chain. They eat not only locusts, but also birds, chickens, ducks or many other plants and animals.
人类处于食物链的顶端，他们不仅吃蝗虫，还吃鸟、鸡、鸭等其他许多动植物。
他们的食物链怎么样？
哪项食物链是正确的？
Where are you on the food chain?
你在食物链的哪一层？
I was at the end of the food chain.
我处在食物链的最末端。
食物链是什么？
Who's at the top of the food chain now?
现在谁在食物链的顶端？
We're at the top of the food chain here.
我们是食物链的顶端。
Or is it just a matter of the food chain?
或者说这仅仅是食物链的问题？
I remembered learning about the food chain in the 7th grade.
我记得在七年级时学过有关食物链的知识。
They replaced other minute organisms as a food source in the major marine food chain.
它们取代了其他微小生物，并成为了主要海洋食物链的食物来源。
As a result, pastoralists, like carnivores in general, occupy a higher position on the food chain.
因此，牧民和广义的食肉动物一样，在食物链中地位更高。
These tiny things form the base of the food chain and play an important role in the global carbon cycle.
这些微小的东西构成了食物链的基础，并在全球碳循环中发挥着重要作用。
Chemical pollution will bring about a threat to agriculture and food chain, and consequently to human health.
化学污染将威胁农业和食物链，进而危害人类健康。
As in the sea, it seems that on the land one key food chain collapsed: the one with leaves as its basic raw material.
和在海洋中一样，陆地上一个关键食物链，一个以树叶为基本原料的食物链似乎也崩坏了。
This disruption of food chain and climate would have eradicated the dinosaurs and other organisms in less than fifty years.
这种对食物链和气候的极大干扰将会使恐龙和其他生物在不到50年的时间内绝迹。
Bees are a critical part of the food chain because flowering plants depend on insects for pollination and the honeybee is the most effective.
蜜蜂是食物链的重要组成部分，因为开花植物的授粉依赖于昆虫，而蜜蜂是最有效的授粉昆虫。
Indeed, with the deaths of so many other animals and with much dead plant material, the food chain based on detritus would have been well-supplied.
事实上，由于许多其他动物的死亡以及植物的大量枯萎，基于腐殖质的食物链本会得到很好的供应。
他开创了一家快餐连锁店。
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