Irma,who was recently inducted into the Blues Hall of Fame, says retirement is not an option for her right now.

VOA: standard.2009.12.25

It's on the market, very popular in terms of your choices right now as an option as an anti-depressant.

它在市场上，作为治疗抑郁症的一种选择,现在非常畅销。

麻省理工公开课 - 化学原理课程节选