Customs union
关税联盟\\n[经] 关税同盟
📖 牛津释义
customs union
agreement between states on what customs duties are to be paid on each other's goods 关税联盟（国与国之间就双方货物的徵税问题缔结的协定）.
🧩 词语组成解析
customs
['kʌstəmz]
n. 关税;海关;习惯( custom的名词复数);海关;
adj. 定做的;专做定货的;
🗣️ 情景例句
Both are equally effective.
两者都有效。
Don't forget to give it to him.
不要忘记送给他。
Who but Jack would do such a thing?
除了杰克谁会做这种事呢？