operator notation

• 算子记号

operator notation的用法和样例：

例句

1. We shall find it convenient to adopt the following notation.
   采用下面的记号是方便的。
2. The policy adopted in this book is to disallow Leibnizian notation within the text.
   本书采用的办法是在正文中不用莱布尼兹记号。