Why do oranges that have been stored for a long time turn green? Why is yogurt sour? Why do the yellow leaves on the ground disappear?
In many common life phenomena, invisible bacteria are actually at work!
In the world we live in, bacteria are actually everywhere! Let us follow the big black dog A Lin and the little yellow rabbit Wen Wen, observe common but wonderful phenomena, explore the ubiquitous bacteria, and become the bacteria detectives of the C19 planet!
Intention: Observe carefully and discover life
