试验结果表明，两用燃料汽车燃用LPG时，在中高频率段噪声水平高于燃用汽油燃料；
The experimental results show that at middle and high frequency ranges, the noise level of the bi fuel vehicle when using LPG is higher than that using gasoline;
目前，我国的CNG汽车动力装置，除比例很小的纯天然气发动机之外，基本上是可以分别燃用天然气和汽油的两用燃料发动机。
At present, except the small proportion of the pure natural gas engines, CNG vehicle powered device is basically flexible-fuel engine that can use natural gas or gasoline dividedly.
目前，我国的CNG汽车动力装置，除比例很小的纯天然气发动机之外，基本上是可以分别燃用天然气和汽油的两用燃料发动机。
At present, except the small proportion of the pure natural gas engines, CNG vehicle powered device is basically flexible-fuel engine that can use natural gas or gasoline dividedly.
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