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High-frequency UPS has an excellent input characteristic, high power density and low cost, so it was popular. But because of the low output impedance, the parallel control is more difficult.

高频UPS 凭借其输入特性好、功率密度高、成本低等优点逐步得到推广应用，但系统输出阻抗低，并联控制较为困难。

With its extremely low input offset current and minimal input voltage burden, it can detect currents as low as 1fA (10-15A).

基于极低的输入偏置电流和输入端压降，静电计能够检测低至1fA（10-15A）的电流。

While the most important characteristics of the electrometer voltmeter operational amplifier are low input offset current and high input impedance, the most important requirement for the nanovoltmeter input preamplifier is low input noise voltage.

静电计电压表使用的运算放大器，最重要的特性是低输入偏置电流和高输入阻抗。纳伏表输入前置放大器的最重要的要求，则是低输入噪声电压。

The signal amplifier should have features like low noise signal, zero drift, high precision, wide frequency band, high input resistance, and low output resistance.

信号放大器应该有特点，例如低噪声信号，零点漂移小，精度高，宽的频带，高输入电阻，低输出电阻。

Direction down the runway with the main category I precision approach instrument landing system, the protection of aircraft in low clouds, low visibility weather conditions, such as the complexity of security movements.

在跑道主降方向设有I类精密进近仪表着陆系统，保障飞机能在低云、低能见度等复杂天气条件下安全起降。

The construction of elementary and middle schools" teacher troop in rural places exists problems which mainly display in the short of population, the overweight of teachers"bear, the low quality of teachers overall, the somewhat low economic status of teachers, substitute teachers stil exist to exist and the insufficience of science and democracy of teachers control system. According to the extant problems, through ?

这些地方农村中小学教师队伍建设中存在的问题主要表现在教师人数短缺、教师负担过重、教师整体素质不高、教师经济地位偏低、代课教师继续存在以及对教师的管理制度不够科学不够民主等方面。

By taking cotton fiber in high yield cotton field of north Xinjiang as the object, the niche-fitness theory were introduced, through analysis the niche-fitness of cotton fiber in three mono-topping and multi-topping intercrop system treatment, the result showed, it is acceptable that evaluate cotton fiber quality by niche-fitness, the niche-fitness value of cotton fiber at the middle part of the cotton plant is the biggest that topping inJul.10th and Jul.25th in this three treatment, moreover, with the increase of topping times, compare with it's top part of cotton plant, the niche-fitness of cotton fiber at the low part of cotton plant have a raise tendency, the niche-fitness value of top and low part of cotton plant in multi-topping treatment is bigger than what of mono-topping.

以北疆高产棉田棉纤维作为研究对象，引入生态位适宜度理论，对三个打顶次数不同的处理的棉花群体棉纤维生态位适宜度进行分析研究，结果表明：用生态位适宜度来评价棉纤维品质是切实可行的，三个打顶处理中7月10日和7月25日打顶棉株棉纤维生态位适宜度均为中部最高，并且随着棉花群体打顶次数的增加，其下部棉纤维生态位适宜度较上部有逐渐增高的趋势，与一次打顶相比较，其二、三次打顶棉株上、下部棉纤维生态位适宜度均升高。

It is suggested that the super low interfacial tension can be obtained with a low concentration of the surfactants by selection of a proper combination system of surfactants.

研究了三元复合驱的技术特点，指出选择合适的表面活性剂复合体系可在低表面活性剂浓度下，获得超低界面张力。

By improving and rebuilding the previous mid-latitude model, we extend the model to high latitude and low latitude, respectively. The extension to high latitude mainly includes the effects of convection electric field and particle precipitation. The low-latitude extension primarily takes account of the configuration of magnetic field and interhemispheric coupling.

在对原有中纬电离层模型改造和重建的基础上，将该模型分别向高纬和低纬扩展，模型向高纬的扩展主要考虑了对流电场和粒子沉降的影响，模型向低纬扩展主要考虑了磁场位形、共轭半球的影响。

The results showed that, there were severe problems of low impact energy and low retained dose in interior surface PⅢ of cylindrical bore.

导致内表面注入剂量和注入能量偏低的根本原因在于筒内鞘层的扩展特性和交叉重叠。

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。