查询词典 necessity

In case of necessity, isofelt line products and be coupled with other materials-aluminium film, Foam Insulation Board rubber,plastic,etc-for the perfect insulation of pipes and other heat sources.

在需要的情况下，这种等毡系列产品，可以跟其它金属-铝膜，泡沫橡胶，塑料等结合；是用于管道和其他热源的优良的绝缘材料。

The knowledge conveyed by Gresham's Law, the first crude formulations of the quantity theory of money--such as those of Bodin and Davanzati--and the Law of Gregory King mark the first dawn of the cognition that regularity of phenomena and inevitable necessity prevail in the field of action.

葛来欣法则（Gresham's Law，也即Bodin和Davanzati的货币数量说最早的模样）和金氏法则所传授的知识，使我们开始了解在行为领域中一些现象的规律性和必然性。

This paper expounds the necessity of construction of teaching reference book database in academic libraries, and probes into some key problems in process of the construction, such as collection of the booklist, database construction criterions, data maintenance and update, copyright protection etc.

摘要本文阐述高校图书馆建立电子教参书资源库的必要性，探讨在建设电子教参书资源库过程中必须注意的若干问题，包括：教参书书目采集问题、建库标准和规范问题、数据维护与更新问题及版权问题等。

If you're forced to bootstrap out of economic necessity, look at the benefits, he suggests.

史比克曼说，如果你不是基于融资需求而被迫选择了自我积累的发展方式，那么就看看那些好处吧。

Necessity and feasibility of improving BOP statistics by making use of information technology.

一、利用IT技术提高国际收支统计质量和效率的必要性和可行性

If Mr Borlaug was the father of the revolution, political necessity was its mother.

如果说勃劳格先生是绿色革命的父亲的话，那么政治需要就是母亲了。

A branch cut off from the adjacent branch must of necessity be cut off from the whole tree also.

从邻枝上切下的一根枝条必定也是从整个树上切下的。

One factor is that women are shouldering a larger breadwinning role at home, either by necessity or choice; females in dual-earner couples now provide an average 44% of household income, up from 39% in 1997, the study says.

一个因素是，女性分担了更多养家糊口的压力，不论是出于自愿还是形势所迫。研究显示，在双职工家庭中，女性贡献的收入平均占44%，而1997年是39%。

One factor is those women are not have toering a huger breadwinning role at habitat, eitIT by necessity or choice; females in dual-earner couples now provide an average 44% of abodehold incoming, up from 39% in 1997, the absorbing says.

唯一因素是，女孩分担了更多养家糊口的压力，不论是出于自愿还得形势所迫。研究呈现，在双职工家里成员中，女孩贡献的获利平均占44%，而1997年是39%。

Chapter two: point out the current state and existing problems of shipping enterprises production and investment management and discuss the necessity of applying break-even point analysis in shipping enterprises.

第二章指出航运企业生产经营管理与投资决策管理的现状及其存在的问题，从而探讨了航运企业运用盈亏平衡分析的必要性。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。