11.   This is easier than trying to date a bronze work, because if a sculpture has been properly maintained, its surface remains practically unchanged.

n. + remain >>共 1272
question 1.83%
market 1.57%
investor 1.56%
inflation 1.40%
price 1.29%
issue 1.20%
people 1.10%
problem 1.03%
economy 0.90%
difference 0.88%
surface 0.03%
surface + v. >>共 185
be 44.82%
have 3.35%
look 2.29%
make 2.29%
become 1.68%
remain 1.68%
give 1.52%
require 1.07%
dry 0.91%
reflect 0.91%
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