gain admittance的用法和樣例：
例句
- One who gains admittance, as to a party or concert, without being invited or without paying.
擅行入場(chǎng)者或無(wú)券入場(chǎng)者一個(gè)沒(méi)有被邀請或未付款買(mǎi)票而闖入一個(gè)晚會(huì )或音樂(lè )會(huì )的人 - A secret word or phrase that one uses to gain admittance or access to information.
口令，暗號某人用來(lái)得以進(jìn)入或獲得信息所使用的秘密的單詞或短語(yǔ)
