Fire is always at the top of the food chain, and it has a big appetite.

The concentrations may be increased or decreased as toxins are passed up the food chain.

随着毒素流经食物链,毒素的含量可能增加地可能降低.

For example, if the number of wolves and foxes decrease, the food chain is upset.

例如, 如果北极狼和北极狐的数量减少, 那食物链就会遭到破坏,就会脱节.

Jasmine , an angry consumer , is arguing with Raymond, a representative from a fast food chain.

一位愤怒的消费者 贾斯敏 正和一家快餐连锁店的代表雷蒙德争论.

The disappearance of some species breaks the ecological balance because the food chain is destroyed.

一些物种的消失破坏了生态平衡,因为食物链被破坏了.

This has made our food chain unbalanced.

这种行为破坏了食物链的平衡.

Campaigners have voiced about the possibility of produce from cloned farm animals entering the food chain.

农业活动者们表示,他们深深担忧那些来自克隆的农场动物的产品进入食品链.

The writer begins by investigating the American industrial food chain.

首先,作者调查了美国工业产上的食物链.

This poses a threat to the food chain and consequently to human health.

这对食物链是一种威胁,并且会进而影响人类的健康.

The top of the food chain would be a good place to start looking.

食物链的最高层应该是个搜索的好的开始.

Producer The first TROPHIC LEVEL , in a food chain.

生产者:食物链中第一个营养级.

With no natural enemies, polar bears are at the top of the Arctic food chain.

一只睡觉的北极熊看起来是值得尊敬的,但是要提防没有天敌, 北极熊是北极食物链的顶尖.

This will change the nature the food chain and break the balance of ecology at last.

这将改变大自然的食物链.最终导致生态的不平衡.

I remember learning about the food chain in the 7 th grade.

我记得在七年级学过有关食物链的知识.

Carefully add different color food coloring into each straw.

小心地将不同颜色的食用色素加入四段吸管.

But this time put 10 drops of red food coloring into the glass of water.

不同的是,这次要往杯子里滴十滴红色的食物色素.

Some people also use food coloring mixed with each layer red and white, very good-looking.

有些人还用食用色素掺入,每层红白相间, 十分好看.

John and Diane are looking for a place to sit in a crowded food court.

约翰和黛安在拥挤的美食广场找位置坐.

At the food court there are many different restaurants to choose from.

在小吃区有很多不同的餐馆可供选择.

Certainly. It's through the mall, above the food court.

当然. 穿过商场, 在食品大厅上面.

The teacher's advice gave me plenty of food for thought.

教师的忠告启发我深思.