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precursor chemicals
 Precursor chemicals
UN sl., drug. 易制毒化学品; 化学先质; 化学前体
| used to
 used to
gen. 过去常常; 向来
| produce
 produce
gen.
interntl.trade. 产物; 物产; 天然物产
| drugs
 drug
environ. 药品

to phrases
Precursor chemicals
UN, sl., drug. 易制毒化学品; 化学先质; 化学前体
precursor chemicals used to produce drugs
: 3 phrases in 2 subjects
Nautical1
United Nations2