This paper presents the advantages and key techniques of raw water hydraulics. The international research state of raw water hydraulics and its application will be principally introduced.

本文阐述了海、淡水液压传动技术的优越性和关键技术问题，并重点介绍了此项技术的国内外研究概况及其应用前景。

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They deal with, principally, state and local governments who are issuing bonds to raise money for their activities, like New Haven, for example, or any other state or local government.

他们主要与,州和当地政府打交道,这些政府机构通过发行债券筹资,例如纽黑文市,或者其他的州,或者其他的当地政府

耶鲁公开课 - 金融市场课程节选

In 2003, the State Department concluded that the North Korean regime had sustained its economic viability principally through counterfeit currency operations.

CENTERFORSECURITYPOLICY: Recognizing the Axis of Evil

Yet he should know that the Shanghai Composite rebounded in December principally because Beijing made a political decision to put even more state money into property and infrastructure.

FORBES: Hang Up On Your China Fund Manager

The film showed the living and working conditions of agency workers brought in to help with the Christmas rush, principally at an Amazon warehouse in Bad Hersfeld, in the state of Hesse.

BBC: Germany probes Amazon warehouse conditions after film