It's like a sheet of paper but it is made of metal, and you can use it to wrap things in - to put things in.   就像是一张纸，但它是由金属制成的。你可以用它包东西——即把东西放进去。

Here, Lucy is using it to keep the cookie sheet clean -to protect the cookie sheet.   这里，露西用它保持烤盘干净——目的是保护烤盘。

She says she does this because after she finishes baking her cookies, she doesn't have to wash any dishes or "to do any dishes."  她说她这么做是因为烘焙完饼干之后，她不用清洗碗碟或者“餐具”。

So, the aluminum foil protects the sheet, and so the cookie sheet doesn't get dirty - the pan doesn't get dirty.   所以，铝箔纸保护了烤盘，烤盘不会脏——模具不会脏。

That's why she uses the aluminum foil; she doesn't have to wash, or do, any dishes. She just throws the foil away. 这就是她使用铝箔纸的原因。她不用清洗餐具，她只是把铝箔纸扔了。

After she puts the foil on the cookie sheet, she shapes "the dough into circles."  把铝箔纸放进烤盘后，她把面团揉成圆形。

The dough, "dough," is a thick material - a thick substance that we use to make cookies.  面团，“面团”，是厚的——一种我们用来做饼干的粘稠物质。

We also use that word, dough, when we are talking about pancakes or waffles, types of food that you would eat in the morning. 当我们谈到早上吃的食物种类，薄饼或者华夫饼时，我们也使用“面团”这个词。