And it's called the Oxford comma or sometimes the serial comma.

这个逗号也被称作牛津逗号，有时也被称为连续逗号。”

The Oxford comma, serial comma, whatever you want to call it comma is that comma plunked down before the " and" on a list.

牛津逗号，连续逗号，无论你想称它为逗号是在列表中的“和”之前插入的逗号。