它是交通工具的语言：大多数飞行员和空中交通管制员都使用它。
It is the language of transport: most airline pilots and air traffic controllers use it.
但是把它放在交通工具上时，同时还要保证交通工具能抗撞击。
But, put it on a vehicle and keep that vehicle crash-worthy.
北京的交通很好，地铁是我最喜爱的交通工具。
The transportation in Beijing is very good. My favorite means of transportation is the subway.
中国的公共交通设施，比如地铁应不应该免费，或者禁止使用公共交通工具。
Should the public transportation, such as the subways be charged free or banned?
中国的公共交通设施，比如地铁应不应该免费，或者禁止使用公共交通工具。
Should the public transportation, such as the subways be charged free or banned?
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