circular level

例句：

1. 1. The circle of light around thetree is very bright.
   围绕树木的光圈非常明亮。
2. 2. The car circled the blocktwice before stopping.
   汽车在街区内转了两圈才停下。
3. 3. Theclock has a circular faceand hands.
   这台钟有一个圆形的脸和指针。