singles是什么意思？

"Say, you know, this is the best student I've ever had," says Kuheli Dutt, a social scientist and diversity officer at Columbia University's Lamont campus. "Compare those excellent letters with a merely good letter: 'The candidate was productive, or intel

"The tax passed today unfairly singles out beverages—including low- and no-calorie choices," said Lauren Kane, spokeswoman for the American Beverage Association.

Compare those excellent letters with a merely good letter: The candidate was productive,or intelligent,or a solid scientist or something that's clearly solid praise, but nothing that singles out the candidate as exceptional or one of a kind.