By assuming the weak lens focal length expression to be the first term in a power series a simple and accurate formula can be derived for the objective focal length of a magnetic electron lens.

用假设弱透镜焦距表达式是一个幂级数中的第一项的方法，可以导出相当准确且便于实用的电磁电子透镜物镜焦距公式。

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Magnetic coils focus the electron beams into fine spots.

磁线圈将电子束聚焦成细小的点。

《柯林斯英汉双解大词典》

We have placed the nanotubes between magnetic electrodes and we have shown that the direction of a single electron spin caught on the nanotube can be controlled directly by an electric potential.

我们把碳纳米管放在磁性电极之间。然后我们发现被碳纳米管捕捉的单电子自旋方向可以被电势直接控制。

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The Alpha Magnetic Spectrometer can observe electron and positrons that emerge from possible dark matter "annihilations" in the Milky Way.

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The measured magnetic moment of the electron agrees with that predicted by the Standard Model to within four parts per billion.

ECONOMIST: Particle physics

In particular, every electron has its own magnetic field aligned with the axis of its spin.

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