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Backbone
脊柱
The backbone is one of bones in the human body.
脊柱是人身体里的骨头之一。
It supports people's backs.
它支撑着人的背部。
Without a backbone, people cannot stand up, sit down or walk.
要是没有脊柱，人就不能站立、坐下和行走。
It is one of the most important bones in the human body.
它是人身体里最重要的骨头之一。
It is also called a "spine".
它也被称为“脊椎”。
Do you know how a backbone is formed?
你知道脊柱是怎样构成的吗？
It is made of many small bones.
它由很多小块骨头组成。
There are usually 29 small bones in the backbone.
脊柱里通常有29块小骨头。
