canonical divisor class

例句：

1. 1.The canonical version of the text is available online.
   该文本的标准版本可在线上获得。
2. 2.The canonical approach to solving this problem is through trial and error.
   解决这一问题的规范方法是通过试错。
3. 3. The canonical form of the document is in black and white.
   该文档的标准形式是黑白的。