n. rumble-tumble
轿车加速行驶噪声 Car acceleration noise
与像电动牛奶车之类的不同，电动车行驶起来出奇地安静，只听得见车轮的辘辘声，还有就是偶尔提醒你前方障碍物时所发出的电动呜呜声。
Unlike, say, an electric milk float, EVs are astonishingly silent, with just the wheel rumble and an occasional electric whine to alert you to their approach.
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模块上移
模块下移
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