For example, all a VFR pilot has to do to enter Class C airspace is establish two-way radio contact with ATC.
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。
First, ATC extends over virtually the entire United States.
首先，空中交通管制几乎覆盖了整个美国。
This is because ATC control of the entire space is essential.
这是因为航空交通管制（ATC）对整个空间的控制是至关重要的。
To enter Class B airspace, such as an approach to a major metropolitan airport, an explicit ATC clearance is required.
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。
No explicit permission from ATC to enter is needed, although the pilot must continue to obey all regulations governing VFR flight.
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。
The first region to have something approximating today's ATC was New York City, with other major metropolitan areas following soon after.
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。
However, this purely visual system was useless in bad weather, and, by the 1930s, radio communication was coming into use for ATC.
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。
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.
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。
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.
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。
Remove atc from the group, as shown in Listing 23.
从组中删除at c，见清单23。
Suppose there was a mistake and user atc was not supposed to be removed.
假设这是错的，不应该删除atc用户。
Instead, user atc was supposed to become the administrator of the group, while xander's administrative rights were to be removed.
相反，应该把atc用户变成组管理员，删除xander的管理权限。
For example, working memory supports the controller's building and updating of the current and projected assessments of the ATC situation.
例如，工作记忆可以支持管制员的思维并更新当前和计划的对空中交通管制形势的估计。
The results proved that it was feasible to count the ATC of metal solid objects by using its special and general ERSC.
计算的结果证明用狭义和广义等效辐射截面系数来计算立体金属目标的天线温度对比度是可行的。
ATC clears you to Beijing at 10000m. After take-off straight climbing to 10000m.
空中交通管制放行你到北京，高度10000米。起飞后直接爬高到10000米。
The Automatic Temperature Compensation (ATC) mechanism automatically adjust the readings for temperature variations of the solution.
自动温度补偿测量仪（ATC）自动调节溶液温度改变的读数。
After replaced No. 2 ATC transceiver, test OK.
更换2号ATC收发机后，测试正常。
The guidelines can let us make best use of the software and hardware establishment of the legacy systems and reuse the reliable and steady core algorithms of ATC systems.
确保能充分利用遗留系统的软硬件设施，封装并重用成熟的、经过实践检验的空管系统的核心算法。
A probabilistic decision-making method for available transfer capability (ATC) considering the existing system conditions in the electricity market is presented.
提出了一种在电力市场环境下考虑现存方式的可用输电能力(atc)概率决策方法。
This papers, which is based on research of the civil ATC system, discuss how to use the UML(Unified Modeling Language) to analyse and design the Radar Control Workstation subsystem.
本文基于民航空中交通管制系统的研发工作，讨论了使用统一建模语言（UML）对雷达管制席子系统进行分析与设计。
In this paper, the basic structure and functions of Automatic Train Control System (ATC) have been introduced, especially the relationship between ATO, ATS and ATP.
介绍列车自动控制系统(atc)的基本结构和功能，尤其是ATO子系统与其他子系统atp、ATS之间的协调工作。
Infected by the market transfer effect, JTH make significant progress in sales representation of ATC product and Doppler radar maintenance business.
在市场传递效应的影响下，金天海又在空管产品代理和气象雷达维修业务取得突破。
Infected by the market transfer effect, JTH make significant progress in sales representation of ATC product and Doppler radar maintenance business.
在市场传递效应的影响下，金天海又在空管产品代理和气象雷达维修业务取得突破。
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