空中交通管制 air traffic control ; ATC ; Air Traffic Chief ; Control air traffic
中国航空主管部门 China' s civil aviation administration
混合中空管系统 Hybrid Tube System
空中管制 Air Control ; AirborneOps ; airborne control ; Grounded
空中交通管制员 AC AirControlman ; ATCO ; ATC
空中交通管制中心 air traffic control center ; ARTCC ; ATCC ; Air Route Traffic Control Center
空中交通管制雷达 air traffic-control radar ; Air Traffic Radar ; radar air tarffic control
阑尾（全名名蚓状阑尾）：解剖学上附于大肠的盲肠的一条退化性中空管。
Appendix (in full vermiform appendix):Vestigial hollow tube attached to the cecum of the large intestine.
喉(亦称音箱)：连接咽部和气管的中空管状结构，空气经过它而进入肺部。
Larynx (or voice Box) : Hollow, tubular structure connecting the pharynx with the trachea, through which air passes on the way to the lungs.
接力棒是一个中空管，通常由金属制成，长度不超过30厘米，重量不低于50克。
A baton is a hollow tube. Usually made of metal, not longer than 30 centimeters and weighing no less than 50 grams.
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