Zhè / běn / shū / yòng / yì / zhěng / zhāng / jiè / shào / Liú / qiú / Hǎi / jí / qí / zhōu / biān / dǎo / yǔ这本书用一整章介绍琉球海及其周边岛屿。This book devotes a whole chapter to the Ryūkyū Sea and its surrounding islands.