莱布尼茨的笔记仅限于牛顿的书的早期章节，这些章节先于牛顿微积分概念和技巧的介绍。

Leibniz' notes are limited to early sections of Newton's book, sections that precede the ones in which Newton's calculus concepts and techniques are presented.

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请记住，这里主要的技巧是找到积分的界限。

So, remember, the main trick here is to find the bounds of integration.

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还有一个相反的技巧，也就是给出了区域，如何去建立它的积分。

And then there's a converse skill which is given the region, how to set up the integral for it.

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