Using XML to extract useful information from semi-structured data sets.

使用XML从半结构化数据集中抽取有用信息。

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SPECT lung perfusion scanning is a simple, convenient and useful method for assessing pulmonary flow qualitatively and semi-quantitatively.

SPECT肺灌注显像是定性、半定量分析肺血流的简单、方便、有用的方法。

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The author generalizes the theorem of Rolle in the calculus from closed interval to semi-infinite interval and infinite interval , which is useful for students to understand theorem of Rolle better.

本文将微积分中的罗尔定理从有限闭区间推广到了半无限区间和无限区间，有助于对罗尔中值定理的理解。

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Sure, it's a semi-useful gauge of the broader economy, but it's inherently no more valid than any other flawed market yardstick.

FORBES: Who Cares About A Sub-10K Dow

CDOs a useful way to get the higher yields on semi-louche corporate bonds while respecting requirements to hold investment-grade paper.

ECONOMIST: Credit markets