If you place the cursor in a word and do not make a selection, the font style is applied to the entire word. If the cursor is not inside a word, and no text is selected, then the font style is applied to the text that you type.
如果将光标置于某个字词中而不是选择文字，则对整个字词采用字体样式。如果光标不在某个字词中，也没有选择文字，则对键入的文字采用字体样式。