Some experts believe it is better for children to lean a language of primary school rather than secondary school
da Yui Ito
1. use difficult word
2. secondary school
2.1. finding right things
2.1.1. can think correct answer
3. skill up
4. disagree
5. primary school
5.1. use easy word
5.1.1. can't easy understand
5.2. chaff
5.2.1. wrong remenber