名词
中文翻译：参与国
同义词：
['participatory country', 'participatingstate']
例句：
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1. The internationalconference was attended by many participating countries.
国际会议吸引了许多参与国参加。
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2. The projectrequires the participation of several participating countries.
该项目需要几个参与国的参与。
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3. Themeeting was attended by representativesfrom all participating countries.
会议有来自所有参与国的代表参加。