The flexing action of the sleeve not only unplugs the valve, but also breaks up the lime.

套管的弹性作用不仅不会堵塞阀门，还能够碎裂固化的石灰。

To get smaller kids involved, create a sticker chart and place a sticker on the chart each time a child turns off or unplugs an electronic device or light that is not in use.

让更小的孩子也加入进来，创建一个标签图标，每次孩子关掉或者拔掉不使用的电器或者灯的插头的时候就给他贴个标签。