名词
中文翻译：单层巴士
同义词：
['single-decker bus', 'single-decker bus', 'single-decker bus']
例句：
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1. The single-decker buses are running on time every day.
单层巴士每天准时运行。
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2. The single-decker buses are a popular mode of transportation in this city.
单层巴士是这座城市流行的交通工具之一。
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3. The single-decker buses have been upgraded to provide better service for passengers.
单层巴士已经升级，以提供更好的乘客服务。