单词	underdrive
释义	underdrive noun : a transmission gear which transmits to the driven shaft a speed less than engine speed or less than the speed provided by the normal gear set Word History Etymology under entry 3 + drive
随便看	pulse oximetry pulse position modulation pulse radar pulse rate pulse time modulation pulse width modulation pulse-jet engine pulse-warmer pulsebeat pulsed pulsejets pulser pulsers pulses pulsific pulsimeter pulsimeters pulsing pulsion pulsions pulsive pulsiveness pulsojets pulsometer pulsometers

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