v. + problem >>共 361
have 22.63%
solve 9.06%
cause 5.52%
face 3.36%
address 2.77%
create 2.61%
pose 2.36%
fix 2.32%
resolve 2.12%
discuss 1.64%
alleviate 0.38%
alleviate + n. >>共 162
problem 13.70%
poverty 10.24%
suffering 6.79%
pain 6.68%
concern 6.46%
pressure 4.45%
shortage 3.34%
symptom 3.34%
fear 2.45%
congestion 2.12%
每页显示:    共 122