【预讲练结】人教版必修三 Unit 4 Astronomy总结
词汇详解：
1.In our solar system eight planets circle around the sun.
在我们的太阳系里八个行星绕太阳运转。
The birds were circling around over the lake.
鸟儿在湖面上空绕圈子。
The teachers are used to circling the pupils' spelling mistakes in red ink.
教师习惯于用红笔圈出学生的拼写错误。
They sat in a circle round the fire.
他们围着火坐成一圈。
In political circles there is talk of war.
在政治圈里，有人谈论到（会发生）战争
2. The origin of life on earth is a question that interests astronomers.
地球上生命的起源是个使天文学家感兴趣的问题。
