voluntary population exchange agreement自愿: volunteer; of one's own free ...居民: resident; inhabitant互换: interchange; counterchange; ...协议: agree on互换协议: celts-5下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:自愿居民互换协议，即可在微信中查询翻译
