1. In large open-air events like sporting events and music festivals. �ڴ��ͻ���Ļ�����˶��ᣬ���ֽھ����С�
2. Police in Thailand say suspected Muslim insurgents opened fire on patrons and threw a bomb at an open-air restaurant in the troubled south. ̩������˵���ڶ������ϲ�������������˹�ּ���������һ��¶�������˿Ϳ�����Ͷ��ը����
3. The Mansion, as it is known, is a traditional Chinese villa, a one-story house with many rooms connected by open-air walkways and beautiful gardens. ����������֪�Ĵ�Ժ����һ����ͳ����ʽլ�ڣ�����ķ��ӣ��ڶ�ķ�����¶����ߵ��������Ļ�����������
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n.
1. where the air is unconfined
2. in the open air