tangent vector on the curve
tangent vector on the curve
曲线上的切向量
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Then actually there are ways you can use basically differentials and constrained partials to figure out what the tangent vector to the curve is and so on.
然后，可以用微分关系,或受约束的偏微分来表示,曲线的切向量，就是这样了。
youdao
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