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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The net result is that if you need to work with only part of the document model (the "first" part, in document order terms), AXIOM delivers great performance.

最后的结论是，如果只需要处理文档模型中的某些部分（如按文档顺序的“第一”部分），AXIOM 提供了优秀的性能。

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First, only the most blinkered liberal could deny that the terms of trade in the debate between freedom and order have become more favourable to the latter.

首先，只有最视而不见的自由派才会否认在自由和秩序孰重孰轻的辩论中所涉及的两者的比价已经产生对后者(即秩序)有利的变化。

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So, in practical business terms the first order of business to find someone who needs that specific solution to a problem.

FORBES: SMAP: Solutions Masquerading as Problems

It's highly unlikely that the Whitehall mandarinate is going to be willing to give Carwyn Jones a free hand in appointing Dame Gillian's successor anyway, which means there is always the potential for the UK Civil Service to install one of their own to keep the First Minister in order, as they might see it, in terms of his attacks on the UK Government.

BBC: The hunt for a new 'Sir Humphrey'

In order to begin listing options on a company, exchanges must first propose the terms of the options and file for approval with Options Clearing Corp.

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