a. + block >>共 663
concrete 9.65%
large 6.97%
trading 3.62%
entire 2.64%
same 2.64%
big 2.21%
huge 1.97%
whole 1.77%
square 1.54%
wooden 1.46%
concrete + n. >>共 878
wall 4.74%
floor 4.72%
block 4.54%
slab 4.35%
step 4.05%
action 3.00%
barrier 2.67%
evidence 2.67%
proposal 2.65%
result 2.41%
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