The medical power supply we bought last time hasn’t been used yet, because a master who can debug the medical power supply took leave to go home and the rest of us couldn’t get it, so we kept it there all the time. But these days it’s not necessary, so it doesn’t matter. I’m also thinking that when the master comes back to debug the medical power supply, I may be able to use it when I look around. After working anyway, I know that it’s better to learn a little more, no matter in the scope of my own functions. Learning opportunities must be seized in order to better enrich their knowledge in the future can also be used elsewhere.