CLEAN : IMF warns may have to slash China growth forecasts: director

The video discusses economic growth projections of 3.2% for the current year and 4.4% for the next year. It highlights the possibility of revising these projections downward due to high uncertainty in the economic environment.

What does the term 'very high uncertainty' refer to in the context of economic projections?

What does it mean to revise projections down?