长余，汉语词语，读音cháng yú，意思是多馀。
长余辉 long afterglow ; [电子] steady persistence ; Long time afterglow
长余辉磷光体 long-lag phosphor ; long persistence phosphor ; phosphor long-lag ; stead persistence phosphor
长余辉同步示波器 storascope
长余辉夜光材料 Long Afterglow Phosphor
长余辉荧光屏 long-persistence screen ; [电子] long persistence screen
长余辉发光材料 long-lasting phosphor ; long persistent phosphors ; long persistence luminescent material ; long persistence material
长余辉旅馆 After Glow Hostel
长余辉荧光幕 slow screen
院长余德美女士 Dagmar Yu-Dembski
罩棚的幔子所余长的，这边一肘，那边一肘，要垂在帐幕的两旁，遮盖帐幕。
The tent curtains will be a cubit longer on both sides; what is left will hang over the sides of the tabernacle so as to cover it.
余曾试图明示，美国人民乃无任何文明之民族，盖因其甚为年轻，不够渊长。
The American people, I have tried to show, are still a nation without any civilization and that is because they are still a young nation.
推导出了成叠带状光纤在松套管中余长的两个计算公式，此两公式是带状光纤缆结构设计需要用到的基本公式。
We have derived two formulas calculating excess lengths for folded ribbon fiber in loose tube. These formulas are useful for structural design of ribbon fiber cable.
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