■ 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。

• deal
• deal with
• dear
• death
• debate
• decadent
• deceive
• decide
• declare
• decline
• dedicate
• deep down
• defense
• defy
• deny
• dependable
• dependence
• dependence 与 dependent
• dependent
• deprive
• deputy
• derive
• desert
• desert 与 dessert
• deserve