http://www.baidu.com/baidu?word=%B9%E2%C8%A6+%BF%EC%C3%C5&tn=myie2dg
DC扫盲 什么是光圈/快门优先http://www.msnqq.net/Article/Player/ShootKnow/2005-08-04/Article_24615.html做人要厚道!