specific precursor 예문

• Illegal organizations began by substituting other chemicals for specific precursors, making the drugs more dangerous to those using them.
• The department enforces a licensing system to control the import, export and dealing of 25 specific precursor chemicals which can be used for the manufacture of dangerous drugs.
• Although the composite-text aesthetic can be traced back through framework-stories ( such as the " One Thousand and One Nights " and " The Canterbury Tales " ), story cycles ( such as the Arthurian stories ), and sacred composites ( such as the Bible ), composite texts had specific precursors in the village sketch of nineteenth century Europe and America.