本文用变分方法计算了环形电场与非均匀磁场重叠场的二级离子轨迹，以能量分散形式加以表述。
The second order ion trajectories in crossed toroidal electric and inhomogeneous magnetic fields are derived by means of the Fermat's principle and expressed in energy deviation.
通过离子轨迹的计算、离子光学系统的设计及一系列的实验研究，改善了系统中的匹配，提高了系统的性能。
The high performance has been achieved by careful calculation of the ion trajectories, close attention to the design of the ion optics and serial experimental studies.
研究者发现当等离子体辐射开来，其轨迹是杂乱无章的。
The researchers found that the trajectory of plasmons became increasingly disorganized as they strayed.
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