必要的例句大全

Theorem 1 and are equivalent infinitesimals if and only if. Theorem 2 The product of a bounded function and an infinitesimal is an infinitesimal.

定理1与是等阶无穷小的充分必要条件为。

For a linear bounded operator in finite dimensional Hilbert space, we first introduce the definition of exactly positive and give a sufficient and necessary condition by the way of space decomposition of the operator;

对有限维Hilbert空间的线性算子，引入了恰好正的概念，并利用算子的空间分解，得到了其存在惟一正逼近的充分必要条件；

At28-You don't need to tell her a story to take her to bed.

在她28岁的时候，连故事都没必要讲就可以带她上床。

To the structure of the internal market as the standard, can be divided into wheel axis, multi-core type, mesh type, mixed type and intangible so five large factory-type model.

以内部市场结构为标准，可划分为轴轮式、多核式、网状式、混合式和无形大工厂式等五种模式。形成区域特色产业集群，是实现苏北新型工业化又好又快发展的必要选择。

Due to the specialty of its conveying medium, we make some necessary transform during the designing of conveying screw.

由于输送介质的特殊性，我们在螺旋输送机的设计中进行了必要的改进。

Actually, the mask and openings are not really necessary; the mirror alone could serve as aperture.

其实, 挡光板及其上的开孔都是不必要的; 单单反射镜本身就可以起小孔的作用.

However, as it is impossible and also unnecessary for ordinary enterprises to keep too many cash assets, having a higher cash ratio is not the better.

但是一般企业不可能、无必要保留过多的现金资产，所以现金比率不是越高越好。

The coupling of partial nitrification and anaerobic ammonium oxidation in a single reactor has been proved to be able to solve the problem of excessive nitrite accumulation, which could inhibit the bacterial activity.

而厌氧氨氧化与亚硝化在单一反应器中耦合也被证明能够解决亚硝酸盐氮过度积累导致细菌活性受抑制的问题，因此研究厌氧氨氧化菌与亚硝酸菌及其他异养菌的共存就非常必要。

In order to raise utilization ratio of container bale capacity and load weight, it is necessary to study how to loading goods.

为了提高铁路集装箱装箱利用率，有必要对铁路货物装箱方案的制定方法进行研究。

Check friction plate and straight pin for signs of damage and replace if necessary.

检查摩擦片和直销有无损坏的迹象，如有必要，应进行更换。

Reciprocity is also necessary. If you are invited by the Chinese to many feasts, you might as well give a return banquet to them.

礼尚往来也是必要的，多次受到中国人宴请，你不妨也回请一次。

The metallogenic material was from deep alkalic basaltic magma, and the pulsatory invasion was the necessary metallogenic condition of the ore deposit.

成矿物质源于碱性玄武岩浆，基性次火山岩浆多次脉动式入侵是矿床形成的必要条件。

However, there are a lot of factors that affect the cutting quality ( the rate of broken biennial root) of cutter.

而影响切割器切割质量（破头率）的因素较多，因此，有必要对甘蔗切割器影响切割质量的各因素进行优化研究，提高其切割质量。

There is still some hope that the economic blockade will work and make military intervention unnecessary.

仍有希望经济封锁将会起作用，也将会使军事干预不必要。

This paper analyzes the domestic and international research of presplit blasting Air-deck Charge technology, and put forward the necessity and urgency of using this technology in the highway construction which through the mountains.

论文分析了国内外预裂爆破空气间隔装药技术的研究现状，并提出了在山区公路修建中使用该技术的必要性和迫切性。

No tape was found in your tape drive. Please insert a blank tape ( and close your tape drive door if necessary).

在磁带驱动器中没有找到磁带。请插入空白磁带（如有必要，关闭磁带驱动器门）。

In the traditional idea political education, the teacher and the students are inequality under the philosophic base of subject and object in binary fission, and the inculcation model without necessary conversation results in the bad education.

传统的思想政治教育，主客体二分的哲学基础使教育者和受教育者处于不平等地位，灌输模式因缺乏必要的对话与沟通使教育效果低下。

The study on the technology and kinetics of chlorination of benzyl chloride is rather essential to the design of reactive distillation column in that the new technology about combination of reaction and distillation is used in the production of benzal chloride.

因为拟采用新型反应精馏耦合技术进行苄叉二氯的生产，研究氯化苄氯化工艺和动力学对于反应精馏塔的设计很有必要。

So the construction of the concrete cable bent tower becomes one of the key technologies in the construction of long-span bridges. It is necessary to study the construction technology of concrete cable bent tower s.

因此，索塔施工成为大跨度桥梁施工的关键技术之一，有必要对混凝土索塔施工技术进行研究。

I could attend to the patients if necessary.

如果有必要,我可以来照顾病人.