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| English | Chinese |
| co-operation | 合作 |
| co-operation policy Political course of action aiming at establishing trade agreements among the states | 合作政策 (以制定各国之间贸易协定为目标的政治方针。) |
| co-operation principle | 合作原则 |
| development co-operation | 开发合作 |
| disaster cleanup operation A course or procedure of activity designed to clear the debris or remove harmful substances left by an ecological calamity, natural or human in origin, in a given area | 灾害清除工作 (一套行动方案或流程，用于清除残骸，或消除由于自然或人类因素引起生态灾害所留下的有害物质。) |
| Hazardous Waste Operations and Emergency Response | 有害废物作业和应急对策 |
| international co-operation The collaboration between governments, businesses or individuals in which it is agreed to work together on similar objectives or strategies, particularly in research or in setting industrial standards | 国际合作 (政府、企业或个人的合作，在为相似的目标或战略共同工作上达成一致，尤其是研究或制定行业标准方面。) |
| scientific co-operation | 科学合作 |