Among other things, they provide electrical insulation, clear up excess neurotransmitters, respond to brain injuries, and form the blood-brain barrier.

除此之外，它们还能提供电绝缘，清除多余的神经递质，对脑损伤做出反应，并形成血脑屏障。

These chemicals-widely used in the middle decades of the 20th century to manufacture electrical insulation, coolants, sealants and plasticisers-often ended up dumped in lakes, rivers and coastal waters.

在20世纪中的几十年中，这些化学物质广泛应用于制造电气绝缘物，冷却剂，密封剂和增塑剂，它的废物排污于湖泊，河流和海水中。