after-school什么意思解释？

I took the kids for a picnic in the park after school.放学后我带孩子们去公园野餐。The teacher kept the boys in detention after school.老师将这些男生课后留堂。The boys didn't know what to do with themselves after school ended.男孩们不知道放学后该做些什么....

after-school的音标：after-school的英式发音音标为：['ɑ:ftərsk'u:l]after-school的美式发音音标为：['ɑftərsk'ul]...