Be careful when go downstaires or upstaires, avoid pushing each other. Don't ride on campus ,put away your bicyles by the way.
上下楼时注意安全，不要相互拥挤。不要在校园内骑自行车，自行车要放好。这两句话用英语怎么说阿？
Be careful when go downstaires or upstaires, avoid pushing each other. Don't ride on campus ,put away your bicyles by the way.