名词
中文翻译：轴心
同义词：
['axis', 'central axis']
例句：
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1.The tree's trunk is the natural axis of the forest.
这棵树的树干是森林的自然轴。
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2. The axis of the planet revolves around the sun.
行星的轴围绕太阳旋转。
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3. The axis of the world economy is shifting towards renewable energy.
世界经济轴正在向可再生能源转移。