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adj.岁差的;因岁差而导致的
1、precessional students───进修学生
1、This criterion is reasonable because it is not expressed in terms of the precessional velocity, but the angular velocity of the permanent rotation.───该判据用永久转动角速度的大小而不是进动角速度的大小作为判别准则,较为合理。
2、The precessional and nutational modes are easily distinguished in Fg. 3, so estimates can be made of their frequency and damping.───进动和章动波型在图3中极易分清,因而就可以测算出他们各自的频率和阻尼。
1、Furthermore , the strength of PVC was detemined by analyzing the motion frequency of precessional center.