medical power supply

My friend told me, you know, there’s still something like medical power supply. I said, how do you know there’s a medical power supply. My friend said that when you go to the hospital, someone will tell you about it. If it was necessary for your family to use it, the doctor would tell you, I thought at that time, if we hadn’t studied and touched the world well, we would have been eliminated sooner or later, because there are so many new things emerging now, if you hadn’t opened your own world, then In the end, they will be eliminated.