For instance, squalene is a key ingredient of moisturizer.

例如，角鲨烯是保湿霜的关键成分。

But did you know that shark livers is a major source of squalene?

但是你知道鲨鱼肝是角鲨烯的主要来源吗？

Instead, we can now make squalene by fermentation of cane sugar, and it's even available on Amazon.

相反， 我们现在可以通过发酵蔗糖来制造角鲨烯，它甚至可以在亚马逊上买到。