open-door

劍橋詞典

allowing people and goods to come freely into a place or country
（對(duì)人或貨物）門戶開(kāi)放的，開(kāi)放的
an open-door system 開(kāi)放制度
open-door regulations 門戶開(kāi)放的條例 返回 open-door