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Optimization of corona ring design for EHV composite insulator using finite element and neural network method.
基于有限元和神经网络方法对超高压合成绝缘子均压环结构优化的研究。
During Sunday's total solar eclipse, the moon covered the sun over Easter Island, so that only the faint, white ring of the sun's upper atmosphere, or corona, was visible.
周日发生在复活节岛上的日全食,月亮将太阳覆盖了起来,只有太阳上层大气所形成的一圈微弱的白色圆环或称日冕处于可见状态。
A solar eclipse occurs when the moon passes between the Earth and the sun, blocking out all of the sun but its corona, or outer ring.
日蚀是在月亮穿过太阳和地球之间时发生,挡住全部的太阳只留下光环或外环。
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