Planetary scientists have also long blamed Venus's sterility on the lack of an internal magnetic field.

行星科学家长期以来也曾将金星的贫瘠归咎于缺乏一个内部磁场。

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Experimental research work is conducted to computerize the instrument of internal magnetic field measurement of metal.

对金属内部磁场测量仪的智能化作了实验研究。

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The more smaller pore size, the more stronger internal Magnetic field gradient. The nmr porosity is significantly lower.

岩石孔径越小，岩石孔隙内部磁场梯度越强，核磁共振测井计算的孔隙度明显偏低；

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The planet has no internal magnetic field, which might be due to its core failing to circulate in the way the Earth's does.

ECONOMIST: Planetary science

For example, nobody knows where the moon's weak, erratic magnetic field came from: was the moon bombarded by magnetic meteors, or did it once have its own strong internal magnetic field that has decayed over time?

ECONOMIST: Divining water