I mean usually you will switch to polar coordinates either because the region is easier to set up.
通常你转换到极坐标系下，有可能积分区域更容易建立。
It calls for Xcel Energy to close four coal-fired units in the region, switch another to natural gas and build a gas-fired plant to help meet federal clean-air standards.
要求埃克·西尔能源公司关掉这个地区的四个燃煤发电机组，把另一个燃煤机组更换为燃气机组，并新建一个燃气发电厂，以符合联邦的清洁能源标准。
With the goal of pre-multi-point, memory, automatic cruise, scanning the region, auxiliary switch control, infrared remote control functions.
具有多点目标预置、记忆、自动巡航、区域扫描、辅助开关控制、红外遥控等功能。
Most of the switch tubes used presently work in the gas spark region (the right branch of Paschen curve), and are made of graphite and mental such as tungsten, molybdenum, stainless steel and mercury.
目前实际应用的开关管多数工作在火花放电区域(巴邢曲线的右支)，使用的电极材料一般为钨、钼、不锈钢、水银、石墨等。
There are points at the border check points, customs and other personnel in the inspection of flats in the port during the switch from the Altay region to send the relevant departments.
口岸设有边防检查站，海关及其他查验单位人员在口岸开关期间由阿勒泰地区有关部门派出。
People whose cortex was thicker and better connected in this region had faster switch rates.
皮质较厚的以及在这区域连接更好的人的转变速率更快。
The traditional direct torque control system has existed large torque fluctuation, poor performance of low speed region, inconstant switch frequency, etc.
传统的直接转矩控制存在着转矩脉动大，低速性能差、开关频率不固定等问题。
For instance, it may be used to explain the "switch law" theoretically, to find the synthesis functions and to determine the boundary of controllable region, etc.
例如可用来从理论上说明“开关”规律，解综合问题以及确定能控区边界等。
By using asymmetrical electrode, the control effect in the coned-shaped and strongly coupling region is enhanced, as a result, the performance of the switch has been improved.
其特点是采用非对称电极结构加强锥形区和强耦合区的电极控制作用，从而提高开关的性能。
Goods travelling across the region are routinely loaded onto different trucks at each provincial border, while tourists have to switch travel agents and guides from municipality to municipality.
跨地区的货物运输在到达省界时往往需要更换卡车装载，游客在不同城市旅游时还要更换导游。
Goods travelling across the region are routinely loaded onto different trucks at each provincial border, while tourists have to switch travel agents and guides from municipality to municipality.
跨地区的货物运输在到达省界时往往需要更换卡车装载，游客在不同城市旅游时还要更换导游。
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