structural problem/amn
a. + problem >>共 705 个
serious 4.46%
economic 3.74%
major 3.48%
financial 2.66%
biggest 2.34%
technical 1.95%
only 1.92%
big 1.91%
potential 1.91%
real 1.87%
structural 0.48%
structural + n. >>共 332 个
reform 17.47%
damage 13.24%
change 9.76%
problem 8.41%
engineer 4.79%
adjustment 3.72%
integrity 1.30%
weakness 1.16%
defect 1.12%
flaw 0.93%
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