对...必不可少

One mobile telephone cell charger is necessarily to a mobile telephone user.

毕业论文页数：57字数：25573摘要：手机电池充电器对手机用户来说必不可少。

Integrated analysis of 7 times heavy rain in Yunnan from July 19 to August 2 based on actual observation weather datum and satellite cloud atlas and Doppler radar image. The results show that: high-low southwest jet stream is important effect system. The maintenance of southwest jet stream provides water vapor, momentum, fast transfer of unstable energy for the lasting heavy rain. The further configuration of plateau shear line and southwest jet stream is necessarily condition about 7 times heavy rain. The lasting heavy rain appeared on big value region of 500hPa vapour flux and vapour flux divergence. The shear cloud band and subtropical high cloud band crossed and confluenced in Yunnan on the satellite cloud atlas. The maintenance and intensification of shear cloud hand and periphery cloud band of subtropical high correspond quite well to heavy rain falling region and cloud band distribution.

应用实测气象资料，结合卫星云图与多普勒雷达图像分析，对2007年7月19日到8月2日云南少有的7次强降水过程进行综合分析，结果表明：高低空的西南急流是重要的影响系统，西南急流的维持为持续性强降水过程提供了水汽、动量和不稳定能量的快速传递，高原切变线与西南急流的有利配置，是7次持续性强降水过程必不可少的条件；持续性强降水出现在500hPa水汽通量大值区和水汽通量散度辐合区；卫星云图上切变云带和副高外围云带在云南汇合，切变云带和副高外围云带维持、加强的过程与强降水落区的时空分布对应较好。

Accompany with the information-based universality, establish the people to come in contact with the calculator more and more, also had more requests to the operation of the calculator, also had higher request to the usage of the plait distance language, for example the usage calculator language develops the small procedure.

计算机迅速发展及信息的快捷传播必然导致计算机的普遍性的普及，计算机的快速发展使越来越多的公司和个人开始拥有自己的电脑，因此现代的公司和个人对计算机的操作越来越成为现实生活中必不可少的步骤。

Dry is a essential craft process to large refine enterprise, is also a site that usually take place hurt affairs, therefore it is necessity to proceed the risk analysis to the drying kiln workshop section.

干燥是大型冶炼企业的一个必不可少的工艺过程，也是经常发生伤害事件的场所，因此有必要对干燥窑工段进行危险性分析。

Since 20 years before , the desulfurizer has become essential critical facility of the iron and steel plant Along with utilization of the desulphurization technology and use of the desulfurizer, processed haze temperature and haze ingredient have had the past compares change, moreover used the haze afterheat technology, and purified sprayed water.

二十多年来，脱硫塔成为钢铁厂必不可少的重要设施。随着脱硫技术的运用及脱硫塔的使用，使处理后的烟气温度和烟气成分与过去相比发生了变化，而且利用上了烟气的余热，并对烟气中的粉尘用水喷淋净化。

This is essential in kayaks or covered canoes, and recommended for open canoeists using thigh straps and rafters running steep drops

对kayak和封闭式的独木舟而言是必不可少的。

So it is necessary to research on the heat engineering performance test facilities.

因而对进行热工试验的试验室—冷藏集装箱热工性能测试环境室进行设计研究是必不可少的。

SUC2 mainly encodes sucrose invertase. The invertase could hydrolyse sucrose into glucose and fructose which are carbon source for yeast growth. When sucrose is used as the main carbon source, invertase is necessary for the growth of yeast. Accordingly, it is of great significance for yeast glycometabolism to study the sequence, transcription and regulation of sucrose invertase.

蔗糖转换酶基因(SUC2)编码蔗糖转换酶，通过降解酵母细胞外的蔗糖成果糖和葡萄糖来提供酵母生长所需的碳源，在以蔗糖为主要碳源的培养条件下，蔗糖转换酶对于酵母生长必不可少，因此研究蔗糖转换酶基因序列、转录、调控等对酵母蔗糖代谢具有重要意义。

Stock market became the most important and absolutely necessary part of securities and financial market after the establishment in China. More and more invertors pay their attentions to stock market. So the analysis and forecast of stock market have not only signification of theory but also merit of application.

股票市场在我国产生以来不断地成长，逐步成为证券业乃至整个金融业必不可少的组成部分，并且受到越来越多投资者的关注，因而对股票市场走势的分析和预测都有重大的理论意义和可观的应用价值。

Most of these micro-organisms cause no problem, and many, like the ones that normally live in the digestive tract and produce life-sustaining nutrients, are essential to good health.

大 多数这些微生物不会引起任何问题，而且许多微生物，像那些通常寄生在消化道并产生维持生命的养分的微生物，对良好的健康是必不可少的。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。