我们用红球替代蓝球, 观察婴儿是否注意到它们的区别.We substitute red balls for blue, to see if the baby would notice.我们昨天晚上电视里看的那场蓝球比赛真是好极了!That basketball game we watch last night on television was simply divine!气球、棒球、蓝球、足球和排球都在火山上跳芭蕾舞.Balloon ...