These are compression folds, like wrinkles on a fruit rind that's dried out.

这些是挤压后产生的褶皱，就像是干瘪皮上的皱纹。

Limes, for instance, have a cocktail of three furanocoumarins that are concentrated in the juice and peel, ready to be released and activated whenever the fruit is bitten—or squeezed into your favorite drink on a beach day.

例如，酸橙汁和皮中就含有三种呋喃香豆素，一旦被咬，或者是在海边被你挤进最爱的饮料时，就会随时准备被激发。

For example, instead of having a whole apple, a CRON dieter will just have the apple skin, which contains most of the nutrients.

举个例子，一个克朗饮食法的减肥者不会吃下整个苹，取而代之的是，他们会吃下包含了大部营养的苹皮。

I wish the boys would not throw orange peel on the sidewalk, said she. Some one may tread upon it, and fall.

“我希望那些男孩不要把皮扔在上，”她说，“会有踩到皮，然后摔倒。”

If the sound isn't hollow it means the rind is too thick.

如声音不是空洞的，则说明皮太厚。

He's eating an orange. He puts a peel in his pocket.

他在吃一个橘子。他把皮放到了自己的口袋。

Apple skins are full of good stuff: fibre, vitamins, and especially flavonoids, a chemical compound known to reduce blood pressure and improve brain and heart health.

苹皮富含有益物质：纤维、维生素，尤其是类黄酮，一种已知可以降低血压、改善大脑和心脏健康的化合物。

More raisins and sultanas and some mixed peel.

再加些葡萄干和小葡萄干，还有一些混合皮。

Right, and that's till the peel's soft?

煮到皮变软？

The reds you want to get some tannin and the color. And tannin and color are in the skin, not in the pulp, in the skin.

" 红酒则需要丹宁酸和颜色，丹宁酸和颜色存在于皮上，而不是在肉。

The pressure finally overcomes the pericarp's resistance and it bursts — the steam and starch expanding to form a foam that quickly cools and dries in the air.

最终压强超过了皮的阻力，于是就爆开了——水蒸气和淀粉膨胀形成了一个泡沫，在空气中快速冷却、干燥。

However, not all produce skins are safe to eat. For example, mango skin contains urushiol, which can trigger allergic reactions in people who are susceptible. The skin of lychee contains toxins that can be harmful if ingested.

然而，并非所有的蔬皮都可安全食用。举例而言，芒皮含有漆酚，这种成会在易感群中引发过敏反应。荔枝皮也有毒，食之对体有害。

When the fruit decays, the smell becomes stronger, which tends to keep animals and insects away from eating the seeds. What a great way for the tree to protect its seeds!

皮腐烂时臭味也会变得更强——臭味让动物敬而远之，银杏也就避免被吃掉的命运，这也是一种自我保护机制。

We conclude that we can eat everything inside while the skin tastes bitter and contains traces of toxic pesticides it ought not to be consumed.

我们得出的结论是，我们可以吃面的任何东西，但皮尝起来很苦，含有微量的有毒农药，它不应该被食用。

And rose, it's just a slight contact with the skins, that produced this little bit of, kind of, pale color that you see here.

玫瑰，它只是与皮轻微接触，就产生了一点你在这看到的苍白颜色。

I'm just cutting off the peel as I don't want any of the pith, the white, as that can be very bitter.

我先把外皮削下来，因为我不想有中皮，也就是白色的部，它的味很苦。

You may be right, answered Pinocchio, but I will not eat the pears if they are not peeled. I don't like them.

“您的话是不错，”皮诺乔接下去说，“可我永远不吃不削皮的梨，水皮我受不了。”

It feels solid to us, but it is only a fragile barrier, an apple skin around a flaming behemoth.

我们觉得地壳很坚固，但它只是个脆弱的屏障，如包裹着燃烧中的庞然大物的苹皮。

But have you ever stopped to think where the peel and other waste from this crop end up?

但你有没有停下来思考过，这种作物的皮和其它废料最后到哪去了？

Their peels, which are rich in flavonoids are also linked to a reduced risk of coronary heart disease.

苹的皮富含类黄酮，能够降低患冠心病的风险。