yán / jiū / yīng / xiān / bì / yǒu / zhù / yú / wǒ / men / liǎo / jiě / yín / hé / xì / de / jié / gòu

研究英仙臂有助于我们了解银河系的结构。

Studying the Perseus Arm helps us understand the structure of the Milky Way.