显然，该地区有一些低空云层，但主要是飞行员和空中交通管制员之间的沟通失误。
Apparently, there were some low clouds in the area, but mostly it was just miscommunication between the pilots and the air traffic controllers.
相对飞机而言，高铁列车的突出优势在于准时，因为基本不受天气或交通管制的影响。
Compared with the airplane, the outstanding advantage of the CRH train is punctuality, because it is basically not affected by weather or traffic control.
相对飞机而言，高铁列车的突出优势在于准时，因为基本不受天气或者交通管制的影响。
Compared with planes, the outstanding advantage of high-speed trains is their punctuality, for it is scarcely influenced by weather conditions or traffic control.
该协会还表示，必须提高机组人员和空中交通管制员的培训标准，因为空中交通越来越拥挤。
The association also said that standards of training must be raised among flight crews and air traffic controllers as the sky has become ever more crowded.
许多人认为，空中交通管制系统是由一排坐在美国机场雷达屏幕前的管制员组成的，他们告诉到达和离开的航班该做什么。
Many people think that ATC consists of a row of controllers sitting in front of their radar screens at the nation's airports, telling arriving and departing traffic what to do.
4月8日，武汉市解除离市交通管制。
1月23日，武汉宣布实施出市临时交通管制。
Jan 23: Wuhan declared temporary outbound (向外的) traffic restrictions.
首先，空中交通管制几乎覆盖了整个美国。
需要持有明确的空中交通管制许可才能进入B类空域，如接近一个大都会机场。
To enter Class B airspace, such as an approach to a major metropolitan airport, an explicit ATC clearance is required.
第一个出现类似现在的航空交通管制的地方是纽约市，很快，其它大城市也开始效仿。
The first region to have something approximating today's ATC was New York City, with other major metropolitan areas following soon after.
例如，VFR飞行员进入C类空域所要做的就是与空中交通管制建立双向无线电联系。
For example, all a VFR pilot has to do to enter Class C airspace is establish two-way radio contact with ATC.
无交通管制的空域被定为等级F，而低于海拔5490米、不在机场附近的管制空域是等级 E。
Uncontrolled airspace is designated Class F, while controlled airspace below 5,490m above sea level and not in the vicinity of an airport is Class E.
尽管飞行员必须继续遵守有关视觉飞行规则的所有规定，但无需获得空中交通管制的明确进入许可。
No explicit permission from ATC to enter is needed, although the pilot must continue to obey all regulations governing VFR flight.
然而，这种纯粹的视觉系统在恶劣天气下毫无用处，到了20世纪30年代，无线电通信开始用于空中交通管制。
However, this purely visual system was useless in bad weather, and, by the 1930s, radio communication was coming into use for ATC.
在20世纪40年代，空中交通管制中心能够而且确实利用了第二次世界大战中新研制的雷达和改进的无线电通讯，但是这个系统还处于初级阶段。
In the 1940s, ATC centres could and did take advantage of the newly developed radar and improved radio communication brought about by the Second World War, but the system remained rudimentary.
北京打算在奥运会期间要求实行类似或者规模更大的交通管制。
Beijing intends to require similar or greater traffic reductions during the games.
这份新合同使空中交通管制设备的运行维护更趋合理、单一、灵活。
This new contract rationalises operational maintenance services for the Air Traffic Control equipment into a single and flexible performance based arrangement.
如若发电站、精炼厂、银行和空中交通管制系统被迫瘫痪，人们便性命难保。
If power stations, refineries, Banks and air-traffic-control systems were brought down, people would lose their lives.
美国仅有一个空中交通管制服务提供商，然而，欧洲有令人难以想象的34个。
Where America has a single provider of air-traffic control services, Europe has a mind-boggling 34.
它的位置几乎恰好处于南美洲和非洲的中间，起着空中交通管制的中转站的作用。
Almost halfway between South America and Africa, it serves as a switching station for air traffic control.
在出现极其长的开发循环(例如，航空交通管制系统)的领域中，这是至关重要的。
In domains with extremely long development cycles (such as air traffic control systems), this is crucial.
民用计算机基础设施包括计算机网络，比如可能控制着空中交通管制系统或者供水系统。
The civilian computer infrastructure would include the networks that control an air traffic control system or a water supply, for example.
在驾驶舱内，飞行员在和巴西方面的空中交通管制部门交谈，报告航班高度和无线电频率。
In the cockpit, the pilots chattered with Brazilian air traffic control, calling out altitude and radio frequencies.
我们将继续制造新型、复杂的飞机和空中交通管制系统，以保证它们能够符合更高的安全水平。
We will continue to validate new, complex aircraft and air traffic control systems to ensure that they meet extremely high safety levels.
主要推断是飞行员驾驶失误或由于空中交通管制，导航设备出现技术故障或者是两者共同所致。
The main theories are errors by the pilot or by the air-traffic controllers, a technical problem with the navigation equipment or some combination of these.
Witte提醒道：“官方取消交通管制措施后，大气污染物浓度旋即反弹上扬。”
"After the authorities lifted the traffic restrictions, the levels of these pollutants shot right back up," Witte noted.
iFACTS将向空中交通管制部门提供一系列的先进工具，从而提高民用航空业需求的能力。
IFACTS will provide air traffic controllers with a set of advanced tools to increase capacity to meet the demand from the civil aviation industry.
例如，构建空中交通管制系统的软件需要某些工作产品以确保多重可靠性检查，满足可调整性等等。
Those who build software for air traffic control systems, for example, need certain work products to ensure multiple reliability checks, regulatory compliance, and so forth.
例如，构建空中交通管制系统的软件需要某些工作产品以确保多重可靠性检查，满足可调整性等等。
Those who build software for air traffic control systems, for example, need certain work products to ensure multiple reliability checks, regulatory compliance, and so forth.
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