名词
中文翻译：顶点
同义词：
['peak', 'summit例句：1. The vertex of the mountain is where the sun first appears.（山的顶点是太阳首次出现的地方。）']
例句：
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1. The vertex of the mountain is where the sun first appears.
山的顶点是太阳首次出现的地方。
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2.The vertex of the curve is the point where the line changes direction.
曲线的顶点是线改变方向的地方。
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3.The vertex of a triangle is the point where all three sides meet.
三角形的顶点是所有三条边交汇的地方。