1. heel n. 脚后跟,踵; (鞋,袜等的)后跟
【地道表达】
I have a blister on my heel because my shoe is too tight.
鞋子太紧了,我脚后跟起了个水疱。
There is a hole in the heel of one of your socks.
你一只袜子的后跟上有个洞。
high-heeled / low-heeled /
flat-heeled 高跟/低跟/平跟鞋

2. patent n. 专利;专利权;专利证
【地道表达】
business patent 营业特许
product patent 产品专利
American patent 美国专利
patent office专利局
patented medicine
专利药品;成药
apply for a patent for ...
为……申请专利
obtain / take out a patent on ...
取得一项……的专利