great congregation of birds flew overhead ., 一大群鸟从头上飞过.
+longitudinal congregation
1 . 纵向群
in the amplifying process of traditona1 traveling wave tube TWT with longitudinal congregation of electrons , space-charge effect will lead to nonlinear effect affecting output properties of TWT .在传统行波管的放大过程中,随着电子纵向群聚的加深,由于空间电荷效应导致的非线性效应,影响了行波管的输出性能。
...部 Congregation for Institutes of Consecrated Life and Societies of Apostolic Life。 religious congregation:修会;献身生活团体:男女教友献身教会,矢发贫穷(神贫)、贞洁、服从三愿,度共同献身生活之团体。此类团体系天主教体制内之社.