加粗斜体

Creating ***bold italic*** text is simply a matter of using both
**bold** (two asterisks) and *italic* (one asterisk) at the same time,
for a total of three asterisks on either side of the text you want to format at once.

创建粗体斜体文本只是同时使用粗体 （两个星号）和斜体 （一个星号）的问题，一次要格式化文本两侧的总共三个星号。