xué / xí / shuāng / gōu / xū / yào / nài / xīn / yě / xū / yào / zǐ / xì / guān / chá / zì / de / jié / gòu学习双钩需要耐心,也需要仔细观察字的结构。Learning double-outline calligraphy requires patience and careful observation of character structure.