名词
中文翻译：往返传播时间
同义词：
['round trip time', 'round-trip travel time']
例句：
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1.The airline's website states that the round-trip flight takes about 2 hours.
航空公司的网站称，往返航班大约需要2小时。
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2. The train service provides a convenient way to get around the city for those who need to make multiple round trips.
对于那些需要多次往返的乘客来说，火车服务提供了一个便捷的出行方式。
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3. The company has announced a new round-trip ticket system that will save customers time and money.
该公司宣布了一个新的往返票务系统，旨在为客户节省时间和金钱。