1. Support Airplane, Sailplane and Helicopter. ���й̶������������ֱ�����Ĺ��ܡ�
2. The stresses caused by flying too fast could peel the wings from the sailplane. ���й���������Ӧ����ʹ������Ļ������䡣
3. A sailplane pilot over Innsbruck, Austria, glides above the Inn River between cloud-topped ranges. �ڰµ�����˹��³�˸������Ƶ�ɽ���䣬һ���������ʻԱ������������Ͽա�
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n.
1. aircraft supported only by the dynamic action of air against its surfaces
2. fly a plane without an engine