例句與造句

1. many persons think that you can't get a patent on a perpetual motion machine . that's not true, as these examples show
   許多人以為永動機沒有辦法獲得專利，那是不正確的，以下是一些例子。
2. It's difficult to find get a patent on in a sentence. 用get a patent on造句挺難的