youdao

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。

youdao

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。

youdao

The makers of sugary breakfast cereals changed how they market to children, and the fast-food chicken dinner chain KFC stopped frying its food in artery-clogging,(high-trans-fat oils) after the group threatened to sue.

VOA: standard.2010.06.24

"Both this and the previous government made this 'chain of terror' argument where we have to be in Afghanistan to prevent al-Qaida moving from Pakistan back into Afghanistan because that may prevent future terrorist attacks on the streets of London.

VOA: standard.2010.08.04

But researchers think its origins lie further down the food chain - in plants, small mammals or insects.

BBC: News | Africa | Fighting back at ebola

Leading European and US retailers have come under growing pressure to ensure that workers in their supply chain - particularly in labour-intensive markets such as India and China - are not exploited.

BBC: Primark fires child worker firms

The short circuit resulted in a thermal runaway -- a chemical chain reaction -- in cell six, which spread to adjacent cells.

CNN: Boeing can conduct Dreamliner test flights