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1.The IATA is responsible for the safety and security of international air travel.
国际航空运输协会负责国际航空旅行的安全和保障。
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2. The IATA has been working on developing a new system to improve air travel efficiency.
国际航空运输协会一直在努力开发一个新的系统，以提高航空旅行的效率。
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3. The IATA is also responsible for regulating the pricing of air travel services.
国际航空运输协会还负责监管航空旅行服务的定价。