劍橋詞典relating to something that is done secretly or in a way that is not direct or honest 後門的；私下的，秘密的；不誠實(shí)的 The change was immediately dismissed as a backdoor tax increase . 這一改動(dòng)被認(rèn)爲(wèi)是變相增稅而立刻遭到否決。 返回 backdoor