21.   The economic downturn brought more sobriety, but people still underestimate the risks that remain, Gates warned.

v. + risk >>共 497
take 13.91%
reduce 12.96%
increase 8.50%
run 5.86%
pose 4.71%
carry 3.83%
raise 2.50%
minimize 2.25%
face 2.20%
lower 1.85%
underestimate 0.23%
underestimate + n. >>共 268
power 7.39%
impact 4.55%
importance 4.10%
number 3.87%
cost 3.53%
demand 2.50%
value 2.50%
risk 2.39%
effect 2.16%
difficulty 2.16%
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