afternoon是可数名词吗

　　afternoons例句：

　　She studies art two afternoons a week.

　　她每周两个下午学习艺术。

　　Afternoons he works at home.

　　每天下午他在家里工作。

　　A series of discussion groups has been timetabled for the afternoons.

　　一系列小组讨论已安排在各个下午进行。

　　She toddles down to the park most afternoons.

　　多数下午她都溜达着去公园。

　　We passed long, hot afternoons pitching a baseball.

　　我们通过投棒球玩打发了一个个漫长、炎热的下午。