idler pulse

例句：

1. 1. The idler pulse of the city is a constant reminder of its busyness.
   城市的闲荡脉冲是其繁忙的一个不断提醒。
2. 2. The idler pulse in the air was a sign of the approaching storm.
   空气中的闲荡脉冲预示着即将到来的风暴。
3. 3. The idler pulse in his heart was a reminder of his past struggles.
   他心中的闲荡脉冲是过去挣扎的提醒。