Why is it that some people lose their native accents and some don’t?

Why is it that some people lose their native accents and some don’t?
It took China less than 70 years to rise to the level of power it is today. What made it possible, and can it apply to Africa?
Dangers of sugar.
What is Coltan and what does it have to do with you?
A lot of nutrition can be gained from ingesting wild and wayside plants and flowers.