What's he crushing with a meat tenderizer?

他要拿松肉锤砸什么东西？

You might see this also called a tenderizer.

你可能会看到这也被称为嫩化剂。

It has some knobs on the top, a tenderizer, but it's for pounding meat.

它的顶部有一些旋钮， 一个嫩化器， 但它是用来捣碎肉的。

I think this acts as a tenderizer, but if it has another purpose, I'm sure you won't hesitate to tell us.

我认为这起到了嫩化剂的作用， 但如果它有其他目的，我相信您会毫不犹豫地告诉我们。

We do this because sunlight acts a bit like tenderizer on a steak, turning the big, tough, durable bonds in PET plastic a bit softer and a bit easier for my bacteria to chew on.

我们这样做是因为阳光有点像牛排上的嫩化剂，使 PET 塑料中大而坚韧、持久的粘合变得更柔软，更容易让我的细菌咀嚼。