Before flying , glider and sailplane pilots may be interested to know if there is adequate lift due to upward air currents 在飞行之前，滑翔机师及模型机操作专家可能想知道有没有上升气流提供足够的抬升动力。
2.
Before flying , glider and sailplane pilots may be interested to know if there is adequate lift due to upward air currents 在飞行之前，滑翔机师及模型机操作专家可能想知道有没有上升气流提供足够的抬升动力。
3.
Based in warren , ohio , the cleveland soaring society ( css ) provides flying facilities for its members on a nonprofit basis and encourages their training by providing ground school and flight instruction in sailplanes and gliders 设在俄亥俄州的克利夫兰滑翔社团( css ) ，在非盈利基础之上为其成员提供飞行设施，地面学校支持和飞行指导，以及滑翔机训练。
4.
The aerospace industry is the complex of manufacturing concerns engaged in the production of flight vehicles ， including unpowered gliders and sailplanes ， lighter than air - craft ， ground - effect machines ， heavier than air craft of both fixed - wing and rotary - wing varieties ， military missiles ， space launch vehicles ， and manned or unmanned spacecraft ； propulsion systems and other thrusting devices ； on board equipment essential to the design purpose of the flight vehicle ； and ground - based support equipment needed for the operation and maintenance of the flight vehicle 译文航天工业是一个综合制造行业，从事各种飞行器的生产，包括：各种无动力滑翔机，轻于空气的飞行器，地面效应机械设备，重于空气的各种固定和旋转机翼飞行器，军用导弹，太空发射器，载人或无人飞行器，推进系统或其他助推设备，对飞行器的设计至关重要的舱内设备，控制和维护飞行器的地面设备。
5.
The aerospace indu * * * y is the complex of manufacturing concerns engaged in the production of flight vehicles , including unpowered gliders and sailplanes , lighter than air - craft , ground - effect machines , heavier than air craft of both fixed - wing and rotary - wing varieties , military missiles , space launch vehicles , and manned or unmanned spacecraft ; propulsion systems and other thrusting devices ; on board equipment essential to the design purpose of the flight vehicle ; and ground - based support equipment needed for the operation and maintenance of the flight vehicle 航天工业是一个综合制造行业，从事各种飞行器的生产，包括：各种无动力滑翔机，轻于空气的飞行器，地面效应机械设备，重于空气的各种固定和旋转机翼飞行器，军用导弹，太空发射器，载人或无人飞行器，推进系统或其他助推设备，对飞行器的设计至关重要的舱内设备，控制和维护飞行器的地面设备。
6.
The aerospace industry is the complex of manufacturing concerns engaged in the production of flight vehicles , including unpowered gliders and sailplanes , lighter than air - craft , ground - effect machines , heavier than air craft of both fixed - wing and rotary - wing varieties , military missiles , space launch vehicles , and manned or unmanned spacecraft ; propulsion systems and other thrusting devices ; on board equipment essential to the design purpose of the flight vehicle ; and ground - based support equipment needed for the operation and maintenance of the flight vehicle 航天工业是一个综合制造行业，从事各种飞行器的生产，包括：各种无动力滑翔机，轻于空气的飞行器，地面效应机械设备，重于空气的各种固定和旋转机翼飞行器，军用导弹，太空发射器，载人或无人飞行器，推进系统或其他助推设备，对飞行器的设计至关重要的舱内设备，控制和维护飞行器的地面设备。
