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| 21. | As the air craft moves forward, the air flowing over the wings produces lift to raise the aircraft off |
| 当飞机向前移动时，机翼上方的气流产生向上的力使飞机飞离地面保持在空中不坠。 |
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| 22. | The air defense corps, equipped basically with anti-aircraft artillery and ground-to-air missile systems |
| 防空兵以高射炮、地空导弹武器系统为基本装备，遂行对空作战任务。 |
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| 23. | With even more recent systems, using a combination of radar and other instruments on the aircraft and |
| 如果使用更新式的系统，在飞机上和地面上把雷达和其它仪器结合起来，驾驶员就能十分安全地完全凭操纵仪表着陆了。 |
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| 24. | "Radio altimeters measure the distance of an aircraft above the ground rather than above sea level, they |
| 无线电高度表测量的是飞机离地面而不是离海平面的距离,用于自动导航及仪表着陆系统上。 |
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| 25. | These services include: supply of aircraft maintenance tooling, ground support equipment-runway sweeper |
| 业务范围包括飞机维修工具,机场地面支援设备-机场跑道清扫板、种车辆、机洁厕液及清洁蜡、机救援设备、机维修设施-维修机库、理坞、频电源系统、井等。 |
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| 26. | To complicate their problems further, the ship and ground anti-aircraft fire had become heavy. |
| 难上加难的是舰上和地面上的高射炮火比先前更加猛烈了。 |
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| 27. | To complicate the problems further, the ship and ground anti-aircraft fire had become heavy |
| 现在满天烟云弥漫，飞机很不容易找到目标，难上加难的是舰上和地面的高射炮比先前更加猛烈了。 |
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