骑行时的呼吸频率和深度均远超乘车时，前者每分钟的呼吸量是后者的4.3倍。
Cyclists breathed more frequently and took more deep breaths than car passengers. They breathed in and out about 4.3 times more air per minute than car passengers.
骑行时的呼吸频率和深度均远超乘车时，前者每分钟的呼吸量是后者的4.3倍。
Cyclists breathed more frequently and took more deep breaths than car passengers. They breathed in and out about 4.3 times more air per minute than car passengers.
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