1、The policy adopted in this book is to disallow Leibnizian notation within the text.
本書采用的辦法是在正文中不用萊布尼茲記號。

2、Those are expressly designed to illustrate the vagaries of Leibnizian notation.
那些是用來說明萊布尼茲記號的巧妙想法。

3、Those are expressly designed to illustrate the vagaries of leibnizian notation.
那些是用來說明萊布尼茲記號的巧妙想法。