the planes were open to the air so passengers had to wear special clothing ang shoes 里面的be open to
问题描述：
the planes were open to the air so passengers had to wear special clothing ang shoes 里面的be open to
答
对..敞开..暴露于..下
所以句子的意思就是 这些飞机曾暴露于空气中(这个我不大理解..)所以乘客需要穿特殊的衣服和鞋子