关税 guānshuì HSK7 tariff Origin Definitions Defs Strokes Stroke Words Sentences Sents 关税壁垒 guānshuìbìlěi tariff wall 关税与贸易总协定 Guānshuìyǔ Màoyì Zǒngxiédìng GATT General Agreement on Tariffs and Trade关税同盟 guānshuìtóngméng customs union 关税国境 guānshuìguójìng customs border