[微幾] 敘述看不懂可以請高手幫忙解釋嗎~

[cksh0300600 ()]

The crucial ingredient is to keep track of a continuous total angle through which the tangent vector has
turned. That is, we need the following
感謝~

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推 Ertkkpoo    :就是要你看那個切線向量轉了幾度(在連續曲線上)
→ cksh0300600 :謝謝~