They have to wait for clearance from air traffic control.
他们必须等待空中交通管制队下达的起降许可令。
Many a person has suffered from air pollution.
空气污染影响了很多人。
A century earlier, Henry Cavendish had noted the existence of a residual gas when oxygen and nitrogen are removed from air, but its importance had not been realized.
一个世纪前，亨利·卡文迪什注意到当空气中的氧气和氮气被除去，还有其他剩余气体存在，但人们还没有认识到它们的重要性。
Nylon is made from air, coal and water.
尼龙是由空气、煤和水加工制成。
It is, for instance, shifting from air to sea transport wherever possible, to reduce carbon emissions.
而公司的运输业在尽可能的情况下由空运转为海运，以减少碳排放。
Adding ground fluorite powder makes the molten metals more fluid and protects the titanium from air as it cools.
加入萤石粉(即氟化钙)可以使熔融态的金属更具有流动性，并在钛冷却过程中将钛与空气隔绝。
The drones are launched from air bases in Afghanistan and Pakistan but are controlled by pilots in the United States.
无人机从阿富汗和巴基斯坦的空军基地发出，但都由身在美国的飞行员控制。
So the morning fog, and the dew on your windshield, comes from air that's cooled enough that it can't hang onto its water.
清晨时分的晓雾和挡风玻璃上的晨露即源于此——空气当中的水分冷凝结成的水珠。
If these targets were to be achieved, significant reductions in risks for acute and chronic health effects from air pollution can be expected.
如果能够实现这些目标，可望大量减少空气污染对健康带来的急性和慢性影响。
But among the many studies that evaluated death from heart problems, some did not separate stress and noise from air pollution as a cause, it said.
不过，该报告说，在众多因心脏问题导致死亡的病例中，研究人员并没有把精神压力、噪声与空气污染的原因分离出来。
Korean airlines, for example, has the world's largest cargo business among passenger airlines, with 28 per cent of its revenue coming from air freight.
例如，在客运航空公司中，大韩航空(KoreanAirlines)拥有全球规模最大的货运业务，其28%的收入来自航空货运业务。
The mummified trees were likely preserved so long because they were buried quickly by landslides and thus protected from air and water, which hastens decomposition.
森林化石之所以能够保存如此长的时间，是因为在山体滑坡中它们被快速掩埋，之后与水和空气隔绝，从而未能腐烂。
"Air France regrets to announce that it is without news from Air France flight 447, flying from Rio to Paris, " Brigitte Barrand, a spokeswoman for the airline, said.
法航的发言人布里吉特·巴兰德（BrigitteBarrand）说：“法国航空遗憾地宣布，法航从里约热内卢到巴黎的447航班仍没有消息。”
At a crisis center at the airport in Rio, relatives of the missing complained of a dearth of information from air France, the Brazilian state news agency reported.
巴西国家通讯社报道，在里约热内卢的危机处理中心，失踪者的家属抱怨缺乏信息的法航。
The index assessed sustainability in 112 cities by looking at 18 environmental indicators — from air pollution to waste recycling to mass transit — for the years 2004-2008.
该指数通过观察2004-2008年的18项环境指标评估112座城市的可持续性，这些指标包括空气污染、污水回收利用、公共交通等。
"I don't see why you couldn't have a meter in the room to register your energy consumption from air-conditioning or heating and you should be charged for that, " he said.
我不明白为什么不能在房间里装上仪表，记录空调或暖气消耗的能源，你应该为此交费。
The worldwide system also supports a wide range of civil, scientific and commercial functions - from air traffic control to the Internet - with precision location and timing information.
由于具有精确的定位和授时能力，该系统还广泛的支持民用、科研以及商业应用，从空中交通管制到互联网。
But Scott Carson, who became head of sales late last year, has produced a spectacular run of orders, including huge deals from Air India and Air Canada (both long-time Airbus buyers).
可是ScottCarson去年晚些时候成为销售主管以后，却带来了订单的长足进步，包括印航和加航的大笔生意(两者都是空客的长期客户)。
Inspired by Australia's worst drought in a century, Mr Linacre - a former student at Swinburne University of Technology in Melbourne - turned to nature to find ways of capturing moisture from air.
丽纳克尔先生——是位于墨尔本的Swinburne工学院的校友，他受澳大利亚百年不遇的干旱的启发，转向从自然中寻找从空气中捕捉水分的方法。
The designers of the plant at Chena, however, managed to slash their capital outlay by substituting mass-produced parts from air-conditioners for the bespoke components of most geothermal plants.
然而，契那发电厂的设计者们利用大量空调部件取代大多数地热发电厂所需地专用部件，从而大幅度地削减开支。
He ventured that plants draw part of their nourishment from the air.
他试探着提出了植物从空气中吸取它们的部分养分的观点。
Plants absorb carbon dioxide from the air and moisture from the soil.
植物从空气中吸收二氧化碳，从泥土中吸收水分。
A cold draught of air blew in from the open window.
一股寒气从敞开的窗户吹了进来。
Blasts of cold air swept down from the mountains.
阵阵强冷气流从山上席卷下来。
The air was fragrant with scents from the sea and the hills.
空气中荡漾着山和海的芬芳气息。
The air was fragrant with scents from the sea and the hills.
空气中荡漾着山和海的芬芳气息。
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