There is long time of speech signal processing and it presents the extensive practical field.

语音信号处理有广泛的应用领域，也有较长的研究历史。

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It can be used in the practical field in which high speed and low calculation precision are required.

这种方法可以用于对速度要求较高、对计算精度要求较低的实际领域中。

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Knowledge network has become one of hot research topics in modern knowledge management circle and practical field.

知识网络已成为现代知识管理理论界和实务界研究的热点课题之一。

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All of this in a way is another way of saying or at least implying okay that political philosophy is an imminently practical discipline a practical field.

也就是说，无论从哪个层面来看,或隐指，政治哲学都是一门,迫切相关于实用的学科,一块实用的研究领域。

耶鲁公开课 - 政治哲学导论课程节选

This question, which at its more fundamental level is related to deep-seated epistemological and methodological controversies over objectivity in the social sciences, is of utmost practical relevance in the field of migration and multiculturalism which has been characterized by rather close relations to public policy concerns.

UNESCO: Social and Human Sciences

Last week, three big oil companies, including Chevron, said it could be practical to develop a massive oil field that is way deep below the waters the Gulf of Mexico.

NPR: Gulf Oil Discovery Could Have Far-Reaching Effect

The practical part of the seminar (field survey) on documentation works including making topographic maps and archaeological survey (putting GPS points of archaeological sites, collect surface materials) will be conducted at the archaeological site Kanka (200 km. from Tashkent).

UNESCO: 7-8 November 2012, Tashkent, Uzbekistan