预防

ABSTRACT］ Objective: To determine the prevention, early diagnosis and aggressive treatment of placental abruption in third trimester.

目的：提高对妊娠晚期胎盘早剥的预防、早期诊断及积极治疗。

And a comprehensive prevention system including all walks of life should be built. We should firmly object and prevent absentminded thought and actions.

学校领导和教师应树立"以人为本"和事先预防重于事后应付的理念，建立社会各方共同参与的综合防治体系，坚决反对和杜绝"无所谓"思想和行为的产生。

Objective To study the effects of the absorbable medical film applied after laminectomy in prevention of peridural adhesion.

目的 观察应用可吸收医用膜预防椎板切除术后硬膜外粘连的效果。

The absorbable medical film is a kind of excellent material for preventing peridural adhesion.

可吸收医用膜是一种良好的预防硬膜外粘连的材料。

To make paper more systematic and practical, this paper has first introduced the development history of CT equipment, then, elaborate construction of system and theworking principle of CT equipment systematically, including the property of X-ray, the absorption law of X-ray for materials, the reconstruction principle of CT image, the structure of software and hardware for CT equipment. Finally, with 2 CT systems that we used, statistic and analysis of all the malfunctions which have carried out in passed 10 years was given, and according to the systematic parts of fault located, classify the malfunctions, then elaborate their working principle one by one, analyze the regularity and the characteristic of each malfunction, and put forward specific prevention method and measure for the malfunction.

为了使论文更具系统性和实用性，本论文首先介绍了CT设备的发展史，然后比较系统地阐述CT设备的工作原理及系统结构，包括X射线的特性和物质对x射线的吸收规律，CT图像的重建原理，CT设备的软、硬件结构等，最后以我们所使用的2台CT为例，对10余年来所出现的故障进行了全面的统计分析，并按故障所处的系统部件进行分类，然后逐个阐述其工作原理，分析其故障的特点和规律，并就这些故障提出具体的预防方法和措施。

However, apart from abstinence, no protective method is 100% effective.

但是，除了节欲，没有任何预防措施是百分百有效的。

While the safest form of birth control remains to be abstinence, many choose to use other methods of prevention.

而最安全的形式节育有待禁欲，许多选择使用其他的预防方法。

Abstinence is the only 100 percent effective method to prevent pregnancy and sexually transmitted diseases.

根据贞洁教育的定义，她是100%能够有效预防未婚怀孕与性病的性教育方式。

Xu Yi said that the United Nations on the prevention of sexually transmitted diseases, made the "ABC" principle. A representative of Abstinency, which means "abstinence", to a total ban may be some difficulty, then step back and to "exercise restraint", in particular young people, we must avoid premature sex. B is Be faithful, which means "loyalty" and replaced by a modern language is to be monogamous or have a fixed partner, not a stranger to have sexual relations. C is the Condom, that is, condoms, this is the last step.

徐克沂表示，联合国对预防性病，提出了"ABC"的原则。A代表Abstinency，意为"禁欲"，要完全禁止可能有些难，那就退一步，做到"节制"，尤其是青少年，一定要避免过早发生性行为。B是Be faithful，意思是"忠诚"，换成现代语言就是要做到一夫一妻制或是有固定的性伴侣，不要和陌生人发生性关系。C就是Condom，即安全套，这是最后一步。

He says, the goal is to stop naked shorting that is done abusively to drive down stock prices.

但是他说制定一个可预防的措施帮助投资者对市场重拾信心是很有必要的。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐