adj.公开的；(对外关系上)门户开放的
Their wedding was an open secret. 他们的婚礼是公开的秘密。
All of his dealings are in the open. 他的一切交易往来都是公开的。
China's open door policy has proved to be a huge success. 中国的门户开放政策已被证实是一个巨大的成功。
