You all know the food pyramid.

我们都知道食物金字塔。

We'll start with the food pyramid.

让我们从食物金字塔开始说起。

This is logical. Plants are the basis of the food pyramid for all living things even for other plants.

这是理所当然的。植物是其他生物甚至其他植物食物金字塔的基础。

So it’s an unusual way that the sharks have found to make the most of what’s available and in effect kind of flip the usual food pyramid.

所以说这是鲨鱼为了充分利用资源找到的不寻常途径，事实上也掀动了平常的食物金字塔。

A decade earlier, scientists had begun to unravel why one-size dietary guidelines in the form of food pyramids, sugar and fat labels and so forth were not turning the tide on diabetes, obesity and other diseases caused by bad diets.

十年前，科学家们就开始解释为什么以食物金字塔、糖和脂肪标签等形式出现的统一饮食指南未能扭转糖尿病、肥胖症和其他由不良饮食引起的疾病的趋势。