1·Specifically, squalene is the gooey oil squeezed from the liver of a shark.
确切地说，角鲨烯是从鲨鱼肝脏中挤出的粘稠油。
2·What is squalene?
什么是角鲨烯？
3·Although vaccines containing squalene have not yet been approved for use in the U.S., they are being distributed elsewhere, including Europe and Canada.
虽然，含有角鲨烯的疫苗尚未被美国批准使用，但是，在欧洲和加拿大等一些其他地方，疫苗正在广泛使用。
4·Within the medical profession, some have raised concerns about the unknown effects of the additives in the vaccines, in particular a substance called squalene.
在医学界，有些人已经对疫苗中的添加物，尤其是一种名为角鲨烯的物质的不明影响表示了担忧。
5·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。