加粗斜體

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.

建立粗體斜體文字只是同時使用粗體 （兩個星號）和斜體 （一個星號）的問題，一次要格式化文字兩側的總共三個星號。