必要性

The paradigmatic sort of ontological entailment is necessitation: P necessitates Q when the material conditional PQ is metaphysically necessary, or when it is metaphysically impossible for P to hold without Q holding.

存有上推导的典型类型是'必要性'：当实质蕴涵PQ是形上学必要条件时，或当"持有P但不持有Q是形上学上不可能"时，P使得Q成为必要物。

You must understand the necessity of education.

你必须懂得教育的必要性。

I don't see the necessity of reading this book.

我看不出读这本书的必要性。

If that is so, it's beyond necessity or discovery.

如果是这样，它的必要性之外或发现。

More and more people have realized the necessity of learning computer.

越来越多的人认识到学习计算机的必要性。

But I must, and I will be, for I honestly see the necessity of it.

但是我必须，我要这样做，因为我确确实实地看到了必要性。

First,this paper introduces the production operation management of the research,analysis of the necessity of the

首先，本文介绍了国内外对生产运作管理的研究动态，分析了研究的必要性、目的和意义。

I believe you read the contents of the following will understand the importance and necessity of it.

相信你看了以下的内容后就会明白它的重要性和必要性。

Combining the practical problem in our country, this paper analyzed the implementation necessity and feasibility of the negative income tax system and used the basic thought of the negative income tax system to put forward the excess regressive income tax system .

本文则针对我国目前存在的弱势群体、城乡收入差距和内需不足等实际问题，分析了负所得税制度在我国实施的必要性和可行性，同时还运用负所得税制度的基本思想提出了超额累退所得税制。

After making a profound survey on the features of "notional be" and negator "not", including those features that may dodge attention; the author explores the possibility of the movement as well as the necessity of the movement.

笔者首先对"实义动词be"以及否定词not的各种语法特征进行深入细致的考察，其中包括一些很容易被忽视的特征。然后笔者着手探究"实义动词be"跨越否定词not此种移动发生的可能性和必要性。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。