形容词
中文翻译：环形的
同义词：
['circumferential', 'ring-shaped例句：1. The tree is annular in shape.（这棵树是环形的。）']
例句：
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1. The tree is annular in shape.
这棵树是环形的。
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2.Annular rings are often found on the surface of planets.
环形圈通常出现在行星的表面。
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3. The moon has annular craters that are visible from Earth.
月球上有环形的陨石坑，从地球可以看到。