It is not to eliminate glasses and contact lenses completely . you may still need glasses for night driving and or reading , depending on your age and initial refractive error 但基于不同人仕的年及度数的差异,手术后,病人可能在某些场合如长时间阅读或晚间驾驶时仍需佩戴眼镜。
Mechanical position sensors of bldcm have several drawbacks , such as low reliability , high cost and usage limitation in some environments , so the experts focus on the sensorless control techniques 无刷直流电动机的机械位置传感器影响着整个系统的可靠性、成本和体积，甚至在某些场合根本无法使用，因此无刷直流电动机的无机械传感器转子位置检测方法成为近年来学术界的研究热点。
On the one hand , countries use public policies in government procurement to regulate , and in some cases , the procurement policies are beneficial to domestic providers and adverse to foreign providers , which we call discriminative procurement policies 一方面，在政府采购过程中，各个国家推行公共政策以实现对社会经济的干预。在某些场合，这些国家的采购政策明显地对本国供应商有利而对外国供应商不利，这时的采购政策可以被称之为歧视性采购政策。
But under some circumstances , such as bad terrain , where it is difficult to pave wire line , where an emergency happens and need to build network quickly , where information security is desired and where lower cost is desired , wireless dcs will be a better solution 但在某些场合，如地形条件不好、铺设电光缆存在困难；要求应急快速组网或临时组网；要求传输信道有一定保密性；因传输距离远，布线经济上不合算和维护成本高等，无线dcs系统将是一个更好的解决方案。
Permanent magnet synchronous machine ( pmsm ) has been paid more attention in the past two decades by researcher in the motor and control system fields because of its excellent performance for example small cubage , great power density and good efficiency we can foresee the further development about pmsm and its control system with the reduce of the permanent magnet material ' s price and producing the rotor progress in the power electronics apparatus and high - speed processor and control theories . 经过努力，其本体设计和控制方式在近二十年内得到了长足的发展，商用化的产品也已经进入到工业生产应用等各个领域。可以预见，随着永磁材料价格和电动机制造价格的降低，电力电子器件及高速微处理器的进去，驱动系统理论研究和实践应用的不断完善和提高，永磁同步及其驱动系统将会得到进一步的发展和应用，在某些场合将逐渐取代现有的普通电励磁电机及其驱动系统。
The 23 saints were not denying that there were some cases where saints had withdrawn from some of their former participation in the church ; however , the real reason for this was not their participation in lsm events , but the utter lack of care exhibited by the elders and the many unrighteous and divisive acts the elders had committed against them , as listed in this timeline prior to july 30 , 2006 23位圣徒并不否认在某些场合，他们从他们往常所参与的教会活动中退出；但是，真正的原因，并不是他们参与lsm的活动，而是长老们对圣徒们极端的缺乏照顾，和长老们针对他们的不义及分裂行为。
