剑桥词典the activity of managing aircraft from the ground as they take off, fly , and land , or the people who do this 空中交通管制（人员）；空中交通调度（人员） Air traffic control at Heathrow have given us clearance to land in 20 minutes . 希思罗机场的空中交通调度人员已经准许我们20分钟后降落。 返回 air traffic control