有效时间

Necessary runnings of vehicles exceeding the above-said road or road bridge limits prior approvals should be conveyed from transportation departments of local people's governments above the county level and necessary and effective protective measures should be adopted.

超过公路或者公路桥梁限载标准确需行驶的，必须经县级以上地方人民政府交通主管部门批准，并按要求采取有效的防护措施；影响交通安全的，还应当经同级公安机关批准；运载不可解体的超限物品的，应当按照指定的时间、路线、时速行驶，并悬挂明显标志。

I chose RITS because of its ties with Middlesex University in London . I was also attracted by the possibility of completing my studies in three years rather than four.

&我之所以选择RITS和密德萨斯大学的联合办学项目，是因为它不仅有良好的管理体制、和伦敦保持实时同步的教学，还可以为我有效的节约时间，使我在三年内完成本科学业而不是四年。&

Another example: a person in writing, the ball-point pen nib put out or put inside a pen to write compared to save time, how best to put the state And so on.

又如：一个人在写字，圆珠笔的笔尖向外放还是向内放比较节约拿笔写字的时间，怎么放的状态最有效等。

Unfortunately, in casting of some special steel grade which requires high purity, most steel works have to shorten the casting time to meet the quality requirement because of the lack of reasonable and effective slag detection technology. This will increase relicts of molten steel and lower the economic performance greatly.

特别是对某些洁净度要求较高的特种钢的浇注，因缺乏合理有效的下渣检测技术，国内大部分钢厂只好采用缩短浇注时间的方法来满足钢水质量的要求，从而导致钢包内残钢量增加，大大降低了工厂的经济效益。

Once this time expires, the CA certificate will have to be recreated, and all of its certificates regranted.

这个是CA证书有效的天数，一旦这个时间过期，证书将必须重新创建，并且它之下的所有证书要重新获得许可

Based on the analysis of traditional converters, a novel circuit is proposed, what it defers from traditional two switches/phase converter is that it has not dump resistance, and that the rise time and falling time of the phase currents can be effectively reduced, and the torque and output power performance of the system is improved.

在分析了常用的功率变换电路基础上，提出了一种基于双开关功率变换电路的改进电路，该电路与常规双开关功率变换电路的区别在于不需要能耗制动电路，能够利用关断相绕组中储存的能量有效缩短相电流的建立和关断时间，改善SR电机高速运行时输出转矩下降和转矩脉动严重的问题，并且电机的输出功率也得到提高。

American Airborne Recoilless Rifles have their setup times reduced to enable them to fire more effectively at moving vehicles.

美军空降兵无坐力炮架设时间降低，以使其能更加有效地射击移动中的车辆。

Hydraulic pile hammer is one of the pile driving machines that drive prefabricated piles into the ground in the construction of pile foundation such as construction,bridge,dock, etc.

用液压打桩锤打桩，可以调整撞击应力波波形，减小应力峰值，延长有效作用时间，是一种比较理想的预制桩施工机械，目前在发达国家已被广泛使用，并形成了系列化。

In the rubber cultivation and the construction of rubber plantation, the restrict effect of seed coat on water lose of kernel and non-sensitivity to lower temperature could be utilized to prolong seed storage period, increase germination rate and improve seedling quality.

在橡胶树栽培和胶园建设中，可利用种皮对种仁水分散失的限制作用以及对低温的不敏感性，有效延长橡胶树种子的贮藏时间，提高萌发率和籽苗质量。

By using this wave plate modulation method, the phase retardance dectected becomes more stable when compared to that of the piezoelectric actuator driven method.

本架构中另一个特点是采用波板来进行调制相位动作，因为波板之相位延迟量较为稳定，较不受外界环境之影响，可有效效降低量测时间与提高系统精确度。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。