transboundary       
adjective [ before noun ] uk/trænzˈbaʊn.dər.i/ us/trænzˈbaʊn.dər.i/
 跨国界,跨界
crossing the border between two or more countries or areas and affecting both or all areas
  Exporters must ensure that a document accompanies each transboundary movement of hazardous waste. 出口商必须保证,危险废料每次跨界都有证明文件。 
 Norway put forward the proposal to control emissions of sulphur dioxide and thereby reduce transboundary pollution. 挪威政府提议控制二氧化硫排放,以便减少跨国界的污染。 
 - More examples
 - This agreement between the U.S. and Canada was designed to address shared concerns regarding transboundary air pollution.
 - We support cross-sectoral, transboundary collaboration including information sharing, and science and technology for all hazards, including biological hazards.
 - The CTE said WTO Members support multilateral solutions to global and transboundary environmental problems and that unilateral actions in this context should be avoided.
 - This final rule consolidates the regulations by making all transboundary hazardous waste shipments with Canada, Mexico and non-OECD countries comply with requirements consistent with OECD procedures.