yán / jiū / zhě / yòng / yán / hǎi / dì / qū / fàn / chēng / zhè / xiē / chéng / shì / suǒ / zài / de / qū / yù

研究者用“沿海地区”泛称这些城市所在的区域。

The researchers use “coastal areas” as a general term for the region where these cities are located.