At the turn of the century battery-powered vehicles were a common sight on city streets, because they were quiet and did not emit any noxious fumes.

在上世纪之交，电池驱动的汽车成为城市里的街道一景，因为它们行驶安静而且不排放有毒烟气。

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This aircraft is battery powered, very quiet and can stay in the air for 20 minutes per sortie.

该机由电池供电，非常安静，每次可滞空20分钟。

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This aircraft is battery powered, very quiet and can stay in the air for 20 minutes per sortie.

该机由电池供电，非常安静，每次可滞空20分钟。

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