2 sentences

1. 木卫一在科学界被称为Io。

   Mù​wèi Yī zài kē​xué​jiè bèi chēng​wéiIo.

   Jupiter's moon Io is known as Io in scientific circles.

   Source: Dong Chinese Dictionary

2. 天文学家正在观测木卫一的运动轨迹。

   tiān​wén​xué​jiā zhèng​zài guān​cè Mù​wèi Yī de yùn​dòng guǐ​jì.

   Astronomers are observing the trajectory of Io.

   Source: Dong Chinese Dictionary