We first introduce methods of finding the sum of the first n terms for an arithmetic sequence of higher order.

我们首先介绍了高阶等差数列前 n 项和的求解方法。

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You can see that once you become accustomed to thinking in terms of higher-order and first-class functions, you can reduce (pun intended) a lot of noise in your code.

您会看到，一旦您习惯了从高阶和一级函数的角度思考，您就能减少（一语双关）代码中无用的部分。

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Although the prevailing quotations are somewhat higher, we will accept the order on the same terms as be fore with the view of encouraging business.

尽管目前报价偏高，但为了促进今后业务的开展，我们仍将按过去条件接受你方订单。

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