It was stressed that the synchronic study is fully justified as it can draw on controllable material for investigation but no rigid theoretical barrier is erected to separate diachronic study.

对语言的共时研究由于可以得到全面的、可控的语言材料以供参考而被充分强调，同时，也没有严格从理论上将之与历时语言研究分离。

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On the other hand, this study also sell tickets for major sports events can draw on the work experience, while sales of tickets for the rich theoretical study, the researchers for future reference.

另一方面，本研究也为大型体育赛事门票销售工作提供可借鉴的经验，同时丰富门票销售方面的理论研究，为以后的研究者提供参考。

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The purpose of the paper is to provide theoretical basis for draw up scientifically territorial control planning, and to take reference for studies similar to it.

研究目的：为科学编制镇级国土整治规划提供理论依据，为同类研究提供参考。

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We are not concerned with theoretical breaches of fiduciary duty when we draw attention to these longstanding practices.

FORBES: SEC Scrutiny of Pension Consultants: A Call To Action (February 28, 2004 )

Much theoretical work has been done to understand and model such changes, but the lesson I draw from chaos theory is that recognizing such changes in hindsight may be simple, but predicting them in advance is and will continue to be extremely difficult.

FORBES: Chaos Theory, Financial Markets, and Global Weirding