【英语时差8,16】不粘锅的奥妙（上）

Teflon is the trademark¹ name for PTFE, a type of plastic. If you own any non stick cookware, then you probably use PTFE on a daily basis. You might not realize, as you fry your morning eggs, that PTFE is one of the most slippery materials that can be manufactured. It’s about as slippery as wet ice. Teflon is chemically similar to another, more common plastic: polyethylene, the material used to make plastic bags and other plastic containers. Chemically, polyethylene is made from long chains of carbon atoms with hydrogen atoms bonded² to the sides of the chains. To make Teflon, the hydrogen atoms of polyethylene are replaced by fluorine atoms.

1 trademark   

n.商标；特征；vt.注册的…商标

参考例句：

• The trademark is registered on the book of the Patent Office.该商标已在专利局登记注册。
• The trademark of the pen was changed.这钢笔的商标改了。

2 bonded   

n.有担保的，保税的，粘合的

参考例句：

• The whisky was taken to bonded warehouses at Port Dundee.威士忌酒已送到邓迪港的保稅仓库。
• This adhesive must be applied to both surfaces which are to be bonded together.要粘接的两个面都必须涂上这种黏合剂。