我有两片嘴唇。
The tool point angle (TPA) is formed by the two lips and is chosen based on the properties of the material to be cut.
两条钻唇形成钻顶角，并根据被钻削材料的性能来选取其大小。
The saying goes "a mouth has two lips, and it teems with gossips". At different standpoints, the words are different.
人家说“人嘴两片皮，说东又说西”，站在不同的立场就有不同的言论。
The saying goes "a mouth has two lips, and it teems with gossips". At different standpoints, the words are different.
人家说“人嘴两片皮，说东又说西”，站在不同的立场就有不同的言论。
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