There are 3 differences between babies "crawling first and then walking" and "not crawling then walking" when they grow up. Parents should pay attention to them.
Children don’t cry when they enter kindergarten just because their mother insists on doing four things. The scientific method can be used for reference
Numerical reading of the global epidemic on June 1: More than 770,000 new cases were diagnosed worldwide every day, and the total number of cases exceeded 530 million. The number of new coronavirus infections among American children has increased for 7 consecutive weeks.