1. heel n. 腳后跟,踵; (鞋,襪等的)后跟
【地道表達】
I have a blister on my heel because my shoe is too tight.
鞋子太緊了,我腳后跟起了個水皰。
There is a hole in the heel of one of your socks.
你一只襪子的后跟上有個洞。
high-heeled / low-heeled /
flat-heeled 高跟/低跟/平跟鞋

2. patent n. 專利；專利權；專利證
【地道表達】
business patent 營業特許
product patent 產品專利
American patent 美國專利
patent office專利局
patented medicine
專利藥品；成藥
apply for a patent for ...
為……申請專利
obtain / take out a patent on ...
取得一項……的專利