名词
中文翻译：Unknown
同义词：
['round ticket', 'round trip', 'round trip ticket']
例句：
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1. They bought a round charter for their vacation.
他们买了一个用于度假的圆形租约。
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2. The round trip ticket costs $50.
这个往返车票要50美元。
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3. He took the round trip ticket to visit his sister in another city.
他买了一张去另一个城市的圆形旅行票以看望他的姐姐。