This paper introduced the methods. problems and the present situation at home and abroad about spermatophore obtainment, spermatophore implantation and artificial external fertilization in shrimp.

本文主要介绍人工获取精荚、精荚移植以及人工体外授精方法、存在问题和国内外的研究现状。

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The second part focused on analyzed the facing present situation and existing problems of training market and trainer brand building, and then explained the need for trainers to shape the brand.

第二部分则着重分析培训市场和培训师品牌塑造面临的现状及存在的问题，并阐述了培训师品牌塑造的必要性。

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The present situation and existing problems in China aero propulsion technology research have been introduced.

分析了我国航空动力技术预先研究的现状及存在的问题。

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Looking at the present situation with student tuition fees and the problems facing the Liberal Democrats I don't see a any single outcome to their "mature debate".

BBC: Local neighbourhood groups to get planning powers