myelin
n. 髓磷脂（等于 myeline）
例句
It's called myelin.
它被称为髓磷脂。
Myelin a protective substance is beginning to coat the spinal column.
髓磷脂是一种防护物质，它开始覆盖在脊柱的表面。
Myelin, a protective substance, is beginning to coat the spinal column.
