面包含有碳水化合物，这是一种由碳、氢和氧组成的化学物质。

Bread contains carbohydrates, which are chemicals made up of carbon, hydrogen, and oxygen.

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实际上，我们摄入的卡路里主要来自小麦和大麦，它们包含碳水化合物可是却缺少蛋白质。

In fact, most calories came from wheat and barley, which are full of carbohydrates but have little protein.

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面包含高碳水化合物，熏肉含高蛋白，它(指熏肉)能分解为氨基酸您的身体需要这些氨基酸，所以吃这些会使你感觉良好。

Bread is high in carbohydrates and bacon is full of protein, which breaks down into amino acids. Your body needs these amino acids, so eating them will make you feel good.

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another thing that you'd find if you looked inside the axon terminals of any of these pre-synaptic membranes, you'd find lots of vesicles or some membrane bound compartments that contain special chemicals called neurotransmitters.

如果你仔细观察,突触前膜的轴突末梢内部,你会发现很多小泡,即膜包被的结构,包含有称为神经递质的特殊化合物

耶鲁公开课 - 生物医学工程探索课程节选