比较宽阔的,露天的用on.回答者：荼间HA - 魔法师 四级 6-5 10:27 On the playground /In the playground 两者同译为“在操场上”.前者指活动范围和参与人数较大,后者指活动范围和人数相对较小且有点被包含的意思,用途更为广泛.请看以下例句：We are playing football on the playground.我们在操场上踢足球.The children skipping over rope in the playground.孩子们在操场上跳绳.All the schoolchildren ran about in the playground.所有的小学生都在操场上跑步.We've walled in the playground to prevent the children getting out.我们在操场四周砌上围墙,不让孩子们跑出去.