Then, like mercury spreading out, it quickly expanded and advanced forward.
And the place they passed, although it was a clean white T-shirt, became whiter than other areas.
Little Brother: "..."
He couldn't even speak.
After a long pause, he stammered, "Sis... sis, isn't this a shoe brush?"
He thought it could only brush shoes!
Chu River gave him a strange look.
"It's all cleaning, cleaning shoes and clothes, isn't it all the same?"
Little Brother: ...
I'm not good at learning. Don't try to fool me.
Can shoe cleaning be the same as clothes cleaning?
But Chu River quickly gave a simple explanation: "Just think of them as a group of nano-robots whose job is to break down dirt. They get close to each molecule where they pass, breaking down grime and then periodically discharging it."
"Earlier, there were a few dirty little balls near the edge of your shoe, see them? Those are the discharges from the dirt."
