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1. The International Railway Transport Association is responsible for the safety of railway transport worldwide.
国际铁路运输协会负责全球铁路运输的安全。
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2. The IRTA has been working on improving the efficiency of international rail transportation.
国际铁路运输协会一直在努力提高国际铁路运输的效率。
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3. The IRTA has also been involved in promoting the development of new technologies for rail transport.
国际铁路运输协会还参与了促进铁路运输新技术的发展。