51.   Keeping a close eye on the visitors are the ever-present plain-clothes military intelligence officers who have maintained a visible presence on University Drive and at the NLD headquarters.

a. + presence >>共 1055
military 17.39%
strong 4.85%
american 3.23%
international 2.49%
physical 2.43%
continued 2.33%
heavy 2.13%
large 1.68%
mere 1.58%
major 1.33%
visible 0.74%
visible + n. >>共 864
sign 7.61%
light 2.83%
role 2.39%
presence 2.26%
change 1.81%
symbol 1.77%
damage 1.55%
part 1.24%
progress 1.11%
injury 1.11%
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