The separation distance between the nozzle and the resonance tube and the feed pressure of the driving gas were the main considerations.

实验中主要考虑喷嘴与谐振管间的分离距离以及供气压力的变化。

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The patient breathing system further comprises an arrangement (11) by which driving gas of the ventilator (2) has been separated from the patient gases flowing in the circle.

所述患者呼吸系统还包括装置（11），通过所述装置（11）使所述呼吸器（2）的驱动气体与在所述循环系统中流动的患者气体相分离；

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Instead of driving everywhere, lace up your sneakers and get some exercise while you save gas.

与其开车到处跑，不如系好鞋带，一边运动一边省汽油。

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The U.S. is even more dependent on Saudi oil than it was when we were driving gas-guzzlers in 1972.

FORBES: The Prize

Apart from his intellectual side, London's spiritual overlord has a gift for playfully provoking the media: he recently suggested that flying unnecessarily or driving gas-guzzlers might be a new way of living in sin.

ECONOMIST: Churchmen and the environment

Recent discoveries of immense amounts of natural gas trapped in shale rock, coupled with the development of new technologies to capture and produce such shale gas, are driving natural gas prices down.

FORBES: New Emissions Data Dampen Global Warming Fears