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An intermediate connecting, you can put money and the belt
　　An intermediate connecting, you can put money and the belt. Ai Wu "accident": "Old Li as a precautionary measure, the temporary asked Lao Zhang, careful of his own paper tickets, the best place is divided into two, inserted into the folds of a crevice, a stuffed into pants passband . "
Translated by Google
No. 2
　　bandpass
　　亦称谱带半宽度(half bandwidth)或有效带宽。无论仪器中光学系统的质量多么高，经单色器单色化后的光总是有一定的波长(宽度)范围，即具有以所指定波长(额定波长)为中心分布的一定波长范围。通带即指最大吸光度值的一半处的谱带宽度。
English Expression
  1. :  passband,  band-pass