chemical use/nsv

21.   Drug officials from four continents announced Friday new plans to clamp down on trade in legally-manufactured precursor chemicals used to produce narcotics such as methamphetamine and heroin.

n. + use >>共 1017 个
company 4.37%
police 3.55%
people 3.04%
government 2.19%
team 1.10%
group 0.92%
system 0.89%
worker 0.86%
official 0.82%
doctor 0.77%
chemical 0.07%
chemical + v. >>共 230 个
be 29.08%
cause 4.68%
have 3.16%
include 3.16%
use 2.65%
pose 1.52%
kill 1.39%
do 1.26%
find 1.14%
combine 1.14%
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