角鲨烯是一种存在于植物、动物和人体中的天然物质，在人体肝脏内合成，并随血流循环。
A naturally occurring substance found in plants, animals and humans, squalene is synthesized in the liver and circulates in the human bloodstream.
角鲨烯是一种存在于植物、动物和人体中的天然物质，在人体肝脏内合成，并随血流循环。
Squalene is a naturally occurring substance found in plants, animals, and humans. It is manufactured in the liver of every human body and circulates in our bloodstream.
颅骨膜血窦是一种罕见的血管畸形，颅内与颅外血液循环借扩张的颅骨板障静脉形成异常交通。
Sinus pericranii is a rare vascular anomaly involving an abnormal communication between the intracranial and extracranial circulations through dilated diploic veins of the skull.
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