- 重点词汇
 
-  化工 
chemical industry; chemical engineering
 -  展会 
exhibition; expo; fair; exposition
 -  发布 
issue; publish; release; break; deliver; ordain; announce; put out; promulgate; disseminate; proclaim; declare; post; publication; announcement; issuance; promulgation
 -  预告 
advance notice; preview; prediction; prognostication; teaser; forenotice; coming attraction; predict; prophesy; portend; herald; trailer; foretell; announce in advance; give notice; preannounce; foreshadow