1. Returns the font object used for standard interface items that are rendered in boldface type in the specified size. 返回字体对象使用了标准介面来指定字体大小附加黑体风格。
2. I put myself in the latter group: No matter what time it is, those boldface, unread messages scream out to be read, replied-to, and archived or deleted. 我把自己归为第二类人：不论何时，那些粗体字、未读的邮件“尖叫着”要我去阅读它们、回复、归档或删除。
3. The separate parts should hae subheadings in boldface to make this organization clear, and to help the reader scan through the final text to find the parts that interest him or her. 分段应有黑体字的副标题，目的是使文章更有条理，能帮助读者清楚地通览全文，并找到他们感兴趣的内容。
英英解释
n.
1. a typeface with thick heavy lines
2. print in boldface
