拓展 On the HSK 7-9 vocabulary list, at CEFR level C2. tuòzhǎn ㄊㄨㄛˋ ㄓㄢˇ to expand to extend to broaden (client base, outlook, territory etc) to scale up to increase system capacity computing Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0 国际中文教育中文水平等级标准, 中华人民共和国教育部, MIT