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They were flying at a low altitude. 他们在做低空飞行。
Flying at a low altitude is tough enough for experts, but deadly for beginners. 在低空飞行对专业人士来说都很困难，对新手则是致命的。
To achieve the maximal operation effectiveness of radar sensor in the defence area, and to detect the low altitude object, it is necessary to meet netting strictness and continuity of detection. 摘要为使防区内多探测源的探测效能发挥最大，并有利于探测到低空突防目标，必须满足预警网探测的连续性和严密性。
In order to get the maximal operation effect of radar sensor in the defence region and oppose the low altitude object, it is necessary to meet the needs of netting detect strictness and continuity. 摘要为使防区内多探测源的探测效能发挥最大，有利于探测到低空突防目标，必须满足预警网探测的连续性和严密性。
The plane made a dive to a lower altitude. 飞机俯冲到较低高度。
When the hose is used is used in high altitude operation, it is recommended that a fixed elbow be used to alleviate the bending of the connectiong portion of the hose. 软管在高空作业时,建议采用固定弯头以减小软管接头部分的弯曲。
The equipments are RAMS3000 intergrade control and display system for all weather &low altitude flight. 设备有用于全天候和贴地飞行的RAMS3000综合控制与显示系统。
A method based on SEA for effectiveness analysis of AWACS for low altitude early-warning is proposed. 对预警机的低空预警效能提出了一种使用SEA进行分析的方法。
The air is not rare at low altitudes. 在低纬度地区,空气不会稀薄。
Drop torpedoes from planes at a low altitude or they might go under the ship you are targeting. 低空投放鱼雷,否则鱼雷很可能扎进深海了。
As a pilot, your task today is to do a very low altitude flight and attack the enemy troops on the ground. 作为一名飞行员,你今天的任务是做超低空飞行,并且打击敌人的地面部队。
An available superwide FOV provides a HUD (Head-Up Display) image that can be used in low altitude flight at night. 在夜间低空飞行时，还可以超大视场角提供抬头显示图像。
This enables the pilot to be saved from a catastrophic failure down to a reasonably low altitude. 这使试点保存从一个灾难性的失败归结为一个合理的低空飞行。
Coming in with a skinful, as I usually did, it was like dropping suddenly to a low altitude. 进门时我通常都喝得大醉，一进来便好像突然来到了海拔低的地方。
Orca Gun ships prowled the skies at a low altitude searching for the attackers, however, they had already withdrew. 水面舰艇枪在天空游逛低空搜索攻击;但是他们已经退场.
On 3 July 1944 Katajainen flew in an enemy AA trap pursuing an Il-2M formation at low altitude. 1944年7月3日，卡塔雅南在低空追逐一队伊尔-2M飞机时落入敌人防空火力的陷阱。
high- altitude operation equipment 高空作业
The epidemic areas and focus extend from low altitude region toward high altitude region. 疫区及疫源地从低海拔地区向高海拔地区蔓延;
Habit: gliding and circling at high altitude or low altitude on the ground or surface to capture small insects. 习性：在高空滑翔及盘旋，或低飞于地面或水面捕捉小昆虫。
In recent years, CCD camera applies to close range photogrammetry and low altitude photogrammetry progressively. 近年来，CCD相机逐步应用于近景摄影测量、低空摄影测量。