pulse

/pəls/

(electronics) a sharp transient wave in the normal electrical state (or a series of such transients)

中文释义：脉冲；脉搏

The device emits a short pulse of light to measure distance.

该设备发出一束短脉冲光来测量距离。

Doctors check the patient's pulse to assess heart function.

医生检查病人的脉搏以评估心脏功能。