查询词典 preventive

Frontier health and quarantine offices shall monitor persons on entry or exit for quarantinable infectious diseases and shall take necessary preventive and control measures.

第十五条国境卫生检疫机关对入境、出境的人员实施传染病监测，并且采取必要的预防、控制措施。

At the last of this paper,preventive and reformative measures are given.

本文还根据分析结果给出了具体的预防和改进措施。

But in practical operating, overvoltage caused by reignition of the vacuum switching device frequently appears, and it result in damage of the capacitor bank or the switchgear itself. Ensuring the switchgear against reignition and installing a protective device are two main approaches to avoid the phenomenon. In this paper, a study on overvoltage caused by reignition due to capacitor bank switching with the vacuum switching device and its preventive measures are carried out. The main work which has been done and researches are as follows: 1. The producing mechanism of overvoltage and its influence factor are analyzed. It is pointed out that single-phase reignition is the main reason for damage of the switchgear and two-phase reignition is the main reason for damage of the capacitor bank,so overvoltage of single-phase reignition and two-phase reignition are the emphases of prevention. 2. Analysis of the special working condition of the operating switch for capacitor bank is carried out. It indicates that the vacuum switching device is difficult to realize no-reignition under this operation condition, so it is more practical to adopt protection devices. 3. Analyses of protection effect of RC and MOA and their shortages are carried out. It shows that the two methods can only restrain effectively overvoltage caused by single-phase reignition, and they cannot protect the capacitor bank when reignition of two-phase occurs. 4. The operation principle of G-R damping device is analyzed and discussed emphatically.

本文针对真空开关投切电容器组时因重燃而产生的过电压及其防治措施进行了研究，所开展的主要工作和研究结果如下： 1、对过电压的产生机理及其影响因素进行了分析，指出单相重燃是导致开关设备损坏的主要原因，而两相重燃则是导致电容器组损坏的主要原因，因此单相重燃和两相重燃过电压是防护的重点； 2、对电容器组操作开关的特殊运行条件进行了分析，指出在这种运行条件真空开关难于实现不重燃，因此采用保护装置更具有现实意义； 3、对RC与MOA的保护效果和存在的不足进行了分析，指出这两种方法均只能有效抑制单相重燃过电压，而不能在发生两相重燃时保护电容器组； 4、重点对G-R阻尼装置的工作原理进行了分析和讨论，指出该装置接入后线路中将会出现两种频率的高频振荡，而电容器组上的过电压是由这两种振荡共同决定的； 5、根据对上述两种振荡的分析指出存在一个最佳电阻值使得过电压最低，并提出了电容器组电压和最佳电阻值的近似求解方法； 6、使用电气暂态分析软件MATLAB对G-R装置的保护效果进行了仿真计算，证实该装置确实可以有效抑制重燃时的电容器组过电压； 7、根据仿真与近似计算结果的偏差提出了近似计算的修正方法，经过修正后的过电压计算结果与仿真结果吻合较好； 8、对G-R装置中放电装置G与阻尼电阻R的要求进行了分析，指出采用编织电阻和真空间隙可能是最佳选择。

Objective:To explore the reasons,operationstyles and preventive measures of reoperation in the near future after LC.

目的：探讨腹腔镜胆囊切除术后近期再手术的原因、手术方式及预防措施。

Ensure the implementation of preventive maintenance to be resultful and update the PM plan timely.

确保预防性的维修保养工作及时、有效的进行。

Post-mining or gob preventive injection, sand-filling or sealed separation in the gob with potential spontaneous fire, Visional judgement or index jndgement for prediction, nitrogene-injection for fire prevention, and control, spraying oxidation retardent to delay coal oxidati...

同时提出某些预防煤田自燃发火的对策——采后或采空区预防性注浆；对可能产生自燃火灾的采空区注砂或充填，加以封闭隔离；采用直观判断、指标判断等方法进行预测预报：注氮防灭火；喷涂阻化剂以延缓煤氧化；选择合理的开拓方式和回采方法：选择合理的通风系统和利于防火的通风方式；控制向采空区的漏风等。

Methods Utilizing the method of reviewable summary to find existing problems and take relevant preventive measures.

采用回顾性总结的方法，找出存在的问题，采取相关的预防控制措施。

They are materials used in training lay people in Salesian principles, Preventive System and Assistance.

这些有关於慈幼会宗旨、预防教育法和支援的材料，主要用以培育平信徒。

He therefore encouraged the Salesian of the continent of Europe "to make a specific contribution" in this new situation which, in his opinion, includes "an unfailing trust in youth, a renewed commitment to education and the constant promotion of the Preventive System", the style of education proposed by Don Bosco.

因此总会长鼓励欧洲的慈幼会士，在这新的境况下，「要作出特有的贡献」，他认为这包括「怀著对青少年永不休止的信赖，对教育作出更新的努力，并不断推广预防教育法」——鲍思高所倡议的教育风格。

Parlour games (dominos, halma, tiddledywinks, spilikins, cup and ball, nap, spoil five, bezique, twentyfive, beggar my neighbour, draughts, chess or backgammon): embroidery, darning or knitting for the policeaided clothing society: musical duets, mandoline and guitar, piano and flute, guitar and piano: legal scrivenery or envelope addressing: biweekly visits to variety entertainments: commercial activity as pleasantly commanding and pleasingly obeyed mistress proprietress in a cool dairy shop or warm cigar divan: the clandestine satisfaction of erotic irritation in masculine brothels, state inspected and medically controlled: social visits, at regular infrequent prevented intervals and with regular frequent preventive superintendence, to and from female acquaintances of recognised respectability in the vicinity: courses of evening instruction specially designed to render liberal instruction agreeable.

191室内游戏（多米诺骨牌，希腊跳棋，挑圆片），抽杆游戏，杯球，纳普，抢五墩牌，比齐克，二十五墩，&抢光我的邻居&，跳棋，国际象棋或十五子棋戏）；为警察署资助的服装协会做刺绣、缝补或编织等活计；音乐二重奏：曼陀林和吉他，钢琴和长笛，吉他和钢琴；法律文件的抄写或代填信封上的地址；每隔一周去看一次杂耍演出；从事一些商业活动：一位老板娘在凉爽的牛奶房或暖和的香烟店里愉快地使唤着，愉快地被服从着；在由国家监督、并加以医药管理的男妓院里，暗自从淫欲刺激中得到的满足；与住在附近的一些被公认为品行端正的女友们进行社交活动，需要有不频繁的定期预防性间隔以及频繁的定期预防性监督；为了讲授合适的交往礼仪而专门举办一套夜间讲座。

Panorama Many people are dancing in a large sitting room.

在一个大客厅里，许多人在跳舞。

We fully understand how a microwave oven cooks food, it is first necessary to talk ...

我们充分理解一个微波炉煮的食物，这是首先要谈。。。