flicker counter

例句：

1. 1. The flash counter on the computer monitorshows the number of users online.
   电脑显示器上的闪烁计数器显示在线用户的数量。
2. 2. Theflicker counter in the room was usedto measure the amount of light entering througha small window.
   房间里的闪烁计数器用来测量通过一个小窗户进入的光量。
3. 3. Theflicker counter was used to detect thepresence of insects in the area.
   闪烁计数器被用来检测该地区昆虫的存在。