cuts brightness pulse

例句：

1. 1. The engineer cut the brightness of the display screen to save power.
   工程师将显示屏的亮度削减以节省电力。
2. 2. The scientist observed the pulse of the heartbeat and recorded the data.
   科学家观察了心跳的脉冲并记录了数据。
3. 3. During the experiment, we need to cut the brightness and pulse of the light source to avoid interference.
   在实验中，我们需要削减光源的亮度和脉冲以避免干扰。