■ and... at that

用来表示比前面所说的更进一步，程度更高。

• He has a Ph. D. degree, and from Harvard at that.他有博士学位，而且是哈佛的。
• Today, food safety is a business—and a booming one at that. (US News & World Report, Dept. 15-22, 2008, p.27)今天，食品安全已经成了一门行业，而且是欣欣向荣的行业。

• this is
• this...that
• those
• threaten
• through
• thunder
• thus
• till
• time
• times
• tired from
• tired from 与 tired of
• tired of
• to
• to
• to be one's to
• to do it
• to do it 与 do so 简化为 to
• toe
• to itself
• toll
• tomato
• tongue
• to not
• too