orbit

地球围绕太阳的运行轨道是椭圆形的。

The Earth's ___orbit around the Sun is elliptical in shape.

卫星在近地轨道上，每90分钟绕地球一圈。

The satellite is in a low Earth ___orbit, circling the planet every 90 minutes.

医生检查后发现他右眼眶有一处轻微骨折。

The doctor found a minor fracture in his right ___orbit during the examination.