zài / yíge / yuán / zhōng / liánjiē / liǎngdiǎn / de / liǎngtiáo / hú / lǐ / chángdù / jiàocháng / de / yìtiáo / jiàozuò / yōuhú

在一个圆中，连接两点的两条弧里，长度较长的一条叫作优弧。

In a circle, of the two arcs connecting two points, the longer one is called the major arc.