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- Note the polarity of the voltage drop across R. 注意R上电压降的极性。
- He got the polarity of the battery reversed. 他把电池两极弄反了。
- Wrong polarity of battery inset protected. 错装反装电池的电路保护设计。
- polarity of sunspots 黑子的极性
- These faculae frequently are the forerunners of sunspot formation. 这些光斑常常是形成太阳黑子的先兆。
- An indicator that the sun's magnetic field is reversing is the appearance of sunspots with the reverse magnetic polarity than normal. 太阳磁场正在倒转的一个指示,就是出现太阳黑子发生磁极颠倒的现象。
- To follow these movements of sunspots is worthwhile for every solar observer. 任何一个太阳观测者值得花时间和精力去跟踪观测太阳黑子的这种移动。
- The number of sunspots is usually taken as an indicator of solar activity. 太阳黑子的数量通常用作太阳活动的指标。
- The two systems of government are polar opposites. 这两种政体正好相反。
- Objective To reestablish cell polarity of hepatocytes cultured in vitro. 目的使培养肝细胞在体外重建细胞极性。
- The polarity of the ends of the open-circuit conductor may then be deduced. 这样就可以断定开路导体两端的极性。
- In summary there are the following possibilities for the observation of sunspots. 总而言之,对太阳黑子的观测存在着下列可能性。
- The number of sunspots, along with other signs of solar magnetic activity, waxes and wanes on an 11-year cycle. 太阳黑子的数目,以及其他太阳磁活动的徵兆,以11年为周期起伏。
- The sunspot cycle,is a recurring 11-year period over which the number of sunspots fluctuates and corresponds to the number of sun flares. 太阳黑子发生的周期为11年。在其周期内,太阳黑子发生的次数有波动,它与太阳闪烁次数一致。
- The sunspot cycle, is a recurring 11-year period over which the number of sunspots fluctuates and corresponds to the number of sun flares. 太阳黑子发生的周期为11年。在其周期内,太阳黑子发生的次数有波动,它与太阳闪烁次数一致。
- The polarity of electrified clouds has been a source of puzzlement and controversy for several hundred years. 起电云的极性问题几百年来一直令人困惑和争论不休。
- This original image using 60-point second exposure, the size of 12 cm, also photographed a number of sunspots, in this copy can be seen. 此原始图像采用60分之一秒曝光,大小为12厘米,还拍到了几个太阳黑子,在此复制品中可以看到。
- Furthermore,the extreme of the annual average air temperature occurred easily with the extreme of sunspot. 太阳黑子峰值年和谷值年前后,江汉平原地区的年平均气温易出现极值。
- Cell Reversal The reversal of the polarity of the terminals of a battery cell as the result of discharging. 电池倒相由放电引起的电池两端极性反转。
- Normally the number of sunspots peaks every 11 years, coinciding with the times when the sun's magnetic field is at its strongest. 一般来说,太阳黑子的数量每十一年达到一次顶峰,正巧和太阳磁场最强的周期一致。