开始活动；开始赛球

play ball───开始活动；开始赛球

fly balls───高飞球，腾空球；飞锤

play backs───重放…录音；把球打回对方

play bass───演奏低音

playbills───戏单（playbill的复数）

bean balls───投向头部的球；猛球

dead balls───死球（停止比赛进行时段）

They must go out and play balls instead of staying at home.───他们必须走出去打打球，而不是呆在家里。

Class is over. Let's play balls.───下课咯，去玩球吧。

They needed to play balls on intuition and gut feel as much as calculated precision.───他们需要用像计算出的精度一样多的直觉和胆量来玩球。

Students in Beijing University like to do exercises a lot . Every afternoon , some students go running , some play balls, some go swimming .───北大的学生都很喜欢锻练。每天下午，有的学生跑步，有的打球，有的游泳。

Yes, human girls always learn to write and draw first, but boys often run and play balls earlier than girls.───是的，人类女孩们总是学写和画时早一步，而男孩却先于女孩学会跑和玩球。

Some ones swim, dance, sing and play balls while others have a nice and quiet weekends by reading or listening music.───有的人游泳、跳舞、唱歌、打球，有的人则享受安静的周末时光，或读书或听音乐。

You should not play balls or shout loudly in the teaching building.───不准在教学楼区随意拍打球类或大声喧哗

I will either play balls or stay at home tommorrow.───明天我要么打球，要么呆在家

Don't play balls in the classroom.───不要在教室里玩球。