Both the brain and the spinal cord are protected by bone: the brain by the bones of the skull, and the spinal cord by the set of ring-shaped bones called vertebrae that make up the spine. They're both cushioned by layers of membranes called meninges (pronounced: muh-nin-jeez) as well as a special fluid called cerebrospinal fluid. This fluid helps protect the nerve tissue, keep it healthy, and remove waste products.
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We all know how to keep the body healthy and how to keep it healthy, right?
我们都知道怎样保持身体的健康还有怎样保持牙齿卫生，对不对？
This fluid helps protect the nerve tissue, keep it healthy, and remove waste products.
脑脊液保护着神经组织，维持着它的健康，并去除废弃产物。
It might still look great on a young person, but, to keep it healthy, you should apply thorough care and use regular skin or beauty treatment with natural masks and moisturizers.
年轻时可能看上去很好，但是为了保持健康，你应该利用多加保护并且使用常规皮肤或美容护理，比如自然面膜和保湿面膜。
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