balls的英语

ball来源于拉丁语 ballare 跳舞，ball 指场面比较大的、正式的舞会n球；球状物a ball of wool 一球毛线 球类活动（如板球、足球等） 人体中类似球的部分the ball of the foot 拇趾球

当然你要说气球balloon也可以

Well do!好球！Good shot!好球！Nice one, Bob!好球，鲍勃！He played a good-length ball back to the bowler.他传给投手一个落点好球。this pitcher throws more strikes than balls.这个投球手投了好几个好球。he finished with three strikes in the tenth frame.第十局他打了三个好球。His coach slapped him on the back to praise him for his good shot.教练拍拍他的背称赞他投了一个好球。call balls and strikes behind the plate.在本垒板后判为好球或坏球。The count is three and two with two away in the seventh.现在是第七局，两好球三坏球，两人出局。The pitcher threw a high inside pitch to brush the batter back.这投手一个高内角球，使击球手紧张而打不出好球。