名词
中文翻译：缩边锯齿
同义词：
['tapered serration', 'tapered tooth', 'tapered edge']
例句：
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1. The blade of the saw has a tapered serration that makes it easy to cut through wood.
这把锯的刀片有锯齿，这使得它很容易切木头。
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2. The teeth on the cutting machine have been tapered to make it more efficient.
切割机器上的牙齿被磨尖了，使它们更高效。
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3.The edges of the knife are tapered to provide a smoother cutting surface.
刀的边缘被磨尖，以提供更平滑的切削表面。