“在露天”的英语可以翻译为：in the open，alfresco，out of doors，out-of-doors ...

今晚电影在露天演.The film will be shown in the open air tonight.只有在露天看台上才得坐在阳光下.It's only in the bleachers where you have to sit in the sun.孩子们在露天游乐场玩得快活极了.The children had a gorgeous time in the amusement park....