menu. To do this, place an empty character string, that is, the inverted commas which surround any text &quot; &quot; , before the section of formula that you want to align. For example, typing
菜单，即可将标准居中的公式进行左对齐。为此，请在需要对齐的部分公式之前放置一个空字符串，即不框住任何文本的反向逗号 &quot; &quot; 。例如，输入