sentences: looking  ahead,  the  global  economic  outlook  still  faces  uncertainties,  mainly  from  1  repeated covid-19 outbreaks, new virus variants, and uneven vaccination progress, leading to a  longer  wait  before  the  pandemic  can  be  well  contained;  2  a  continued  buildup  of  financial  fragilities, including elevated asset prices around the world and an outsize global debt overhang;  3 changes in monetary policy of major central banks, which could trigger global financial market  turbulence; 4 lingering global economic and trade uncertainties such as us-china relations, as  well  as  risks  associated  with  climate  change