To explore this area, the team chose pieces of music that contained several movements, which are self-contained sections that break a single work into segments.

为了探索该领域，该科研小组选择了几支包含若干乐章的音乐，每段乐章本身又分成了若干片段。

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If those two branches in turn each split into two branches, the area of the cross sections of the four additional branches together will equal the area of the cross section of the trunk. And so on.

这条的规律可以简单描述为：如果一根树干分叉为两个树枝，那么两个树枝的横截面积之和等于树干的横截面积；如果树枝接着分别分叉为两根小树枝，那么这四个次生分枝的横截面积总和仍等于树干的横截面积……依此类推。

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One of the most complex sections of any e-commerce Web site is the product-details area.

在电子商务 Web 站点中，最复杂的部分之一是产品细节部分。

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The report says stopping or restricting access for car and buses along sections of the street could help improve the area for pedestrians and tourists.

BBC: Castle cordon

Other sections of the protocol govern the frequency, scale and area of such maneuvers.

CNN: A complex security minuet has started in North Asia

Archaeologists found evidence of a number of stone buildings with stone floors across the entire area, with cobbled sections in between.

BBC: Stones