外电报道说：Federer worked off the rust from a five-week layoff caused by a sore foot, and Roddick compensated for an undependable serve during their first-round wins Monday in the $2.45 million tournament.

　　句中的work off表示"消除；去除"的意思。例如：She works off stress by running for at least half an hour every day.（她每天最少跑步半个小时以减轻精神压力。）Do something to work off your frustration with the job or you'll become ill.（干点什么来减轻你工作上的挫折感，否则你会生病的。）