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Vapor explosion is a compositive multiphase phenomenon including four stages: coarse premixing, triggering, propagation and expansion. The mechanisms involved in the vapor explosion process have not been understood, which prevents predicting the explosion precisely.

蒸汽爆炸是一个综合的多相流现象，包括粗混合、触发、传播和膨胀四个阶段，目前蒸汽爆炸过程中的机理还未被完全了解，这阻碍了对蒸汽爆炸现象进行准确预测。

The right to a jury trial prevents police and prosecutors from locking someone up without first proving to a group of ordinary citizens that he or she deserves punishment.

被告申请陪审团审判的权利使警方和检察官不得在向一组普通市民表明某人该当惩处之前便将其关押起来。

The machine head action called orbital, prevents the creation of holograms, paint burns and other forms of paint damage often associated with high speed rotary polishers and buffing machines.

机器头行动叫轨道，防止的全息图的创造，油漆燃烧和其他经常同高速旋转抛光工人并且擦亮机器交往的油漆损害的形式。

This feeling mercifully mitigates the sense of responsibility which so easily becomes paralysing, and it prevents us from taking ourselves and other people too seriously; it conduces to a view of life in which humour, above all, has its due place.

这种体会可以宽大为怀地减轻那种容易使人气馁的责任感，也可以防止我们过于严肃地对待自己和别人；它导致一种特别给幽默以应有地位的人生观。

Taking note of these thoughts improves your hindsight, prevents oversights from occurring and results in more breakthroughs in your thinking.

记下这些想法可以不断改进事后经验，避免发生疏忽，并且能够突破你的思维。

In negative inducible operons , a regulatory repressor protein is normally bound to the operator and it prevents the transcription of the genes on the operon.

在负向可诱导操纵子中，一个调节的阻遏蛋白质一般会与操纵基因结合，并阻止操纵子中基因的转录。

Municipal authorities complain that nimby attitudes hinder the efficient organisation of the city; developers view local opposition as unreasonable. Some experts blame nimbyism on a lack of scientific understanding; residents elsewhere in the city lack concern or complain that it prevents improvements to their quality of life.

市政部门常常认为邻避主义妨碍了城市的有效管理，开发商常常认为邻避主义属于无理取闹，相当一部分专家会认为这样的抵制是基于不科学的理解，同一城市的其他市民也常常对当地居民的邻避抗争漠不关心，甚至抱怨这影响了整座城市生活品质的提升。

World War II footage has that familiar black-and-white scene: a heavily damaged war bird lands out of control on the stern of a straight-deck carrier and crashes into a steel cable net, which prevents it from ramming into aircraft waiting to take off.

讲到第二次世界大战的影片里头，常常会出现一种熟悉的黑白场景：一架严重受损的战机，失控降落在航空母舰笔直甲板的最末端，猛地冲入钢缆制成的网子里头，刚好没有撞上其他正在准备起飞的战机。

Walnut oil contains unsaturated fatty acid. It is the important constituent of the cerebral tissue and prevents cerebral arterosclerosis.

核桃油含有不饱和脂肪酸，是脑组织的重要组成成分，且能防止脑动脉硬化。

The twenty-sixth article of the constitution of our country stipulates:"the state protects and improves living and ecological environment, and prevents pollution and other social effects of pollution".

我国宪法第26条规定：&国家保护和提高生活及生态环境，并防止污染和其他公害&。

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。