不漏的

The author manages to find out the origins of these words from the perspective of the developmental history of Chinese words, and to present a further description for the historical track along which the meanings of these words develop. Another goal of this thesis is to supplement the present dictionaries with some meanings of certain words or even words which fail to be collected, to ccrrect some mistakes in these dictionaries or other relevant works, to show the influence of the languages of Buddhist documents on that of Dunhuang documents, and eventually to enlighten people as to the study on the development of the common-core words in Chinese as well as the lexicological history of the Chinese language.

本文即综合运用类比归纳、据对文或异文以求同义词或反义词，以及探求语源等方法，对敦煌变文中19组34个&字面普通而义别&的俗语词逐一进行了考释，试图从汉语词汇发展史的角度去考察语源，寻求其成词及得义之由，并进一步探索其词义演变发展的历史轨迹，以期弥补字典辞书的失收或漏释、匡正字典辞书及此前著作的误释或释义不清、说明佛典文献语言对敦煌文献的影响，最终达到给汉语常用词演变研究以及汉语词汇史研究以一点小小的提示与启发的目的。

Based on the practice of the use of φ95mm subsurface sucker rod pump in Shengtuo Oilfield in recent years, the causes of the failure of the pump are analyzed, and relevant precautions are put forward:(1)selecting oil wells with sufficient fluid supply for pumping;(2)under the condition of the pump efficiency being the same, the submergence depth of the pump being somewhat larger than that of the small pump, and 450～500m being feasible;(3)adopting Grade H ultrahigh-strength rod string and fixing a sinker bar at the bottom of the rod string;(4)selecting long stroke and low pumping speed, and more than 5m stroke and less than 6min-1 pumping speed being recommended;(5)adopting zirconium oxide valve ball and seat ＋ spray welded plunger ＋ nitrided barrel.

根据胜坨油田近几年采用φ95mm有杆抽油泵提液的实践，分析了造成这种抽油泵失效的原因，包括与其配套的脱节器失效、抽油杆断脱、泵漏、电动机不配套和生产管理不善等。为增强泵的提液能力和工作可靠性，提出5 项预防措施：(1)选择有充足供液能力的油井；(2)在保持相同泵效的情况下，泵的沉没度应略大于小泵，推荐按450～500m设计；(3)采用H级超高强度抽油杆柱，并在杆柱底部配置一定重量的加重杆；(4)采用长冲程、低冲次的参数匹配，推荐光杆冲程大于5m，冲次小于6min-1；(5)为提高泵筒、活塞和阀座的防腐耐磨性，推荐采用&氧化锆阀球和阀座+喷焊柱塞+氮化泵筒&的结构形式。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。