It is created using a Paragraph as title and an int as chapternumber.
使用Paragraph作为题目并使用int作为章节号码来创建它。
2
In the code above, we created a new chapter object, chapter1, with the title "This is chapter 1." Setting number depth to 0 will not display the chapternumber on page.
在上面的代码中，创建了一个新的章节对象，chapter1，其标题为“This is chapter 1”，将编号级别设为0就不会在页面上显示章节编号。
3
But from these two definitions appearing in book III chapter 6 and book IV chapter 1 we learn a number of important things.