侧生器官沿茎轴呈笔直纵行排列的状态称为叠积。在轮生、对生、互生的叶序中都有这种现象。
玛吉的厨房就没有闲置过，它有一个特色，那就是永远堆满了成叠的书、报纸和杂志，而从一月开始，这些东西在那些暗无天光的日子里越积越多。
Piles of books, papers, magazines had always been a feature of Maggie's lived-in kitchen and they had grown in the dark days since January.
结果表明，弯曲叶片性能不仅与叶片两端部的弯曲角度有关，也与积叠线的形状和长度有关。
The results show that the performance of curved blade is influenced not only by the end Angle, but also by the shape and length of the stacking line.
运用该平台对某NASA跨音速单级透平动静叶片及该透平静叶的叶型和弯积叠线进行多目标气动数值优化研究。
Use this platform to optimize the blades of a NASA transonic single stage turbine, the bended stacking line and the profile of this transonic stator.
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