Sugar is sweet and tasty! And a coat is the outer covering of something.

糖很甜很好吃。而外层是指某种东西的外面覆盖物。

We're going to look in detail at the thickness of the grey matter - that's the outer covering of the brain.

我们将详细观察灰质的厚度——灰质是大脑的外层覆盖物。

30 minutes to steam it and five minutes to remove the outer covering.

蒸 30 分钟，去除外壳 5 分钟。

To get a better sense of what I mean, take a look at this balloon. The latex is like the outer covering of your body, in part made up of epithelial tissue.

为了更好地理解我的意思，看看这个气球。乳胶就像你身体的外层覆盖物，部分由上皮组织组成。