reduced wave number zone 约化波数带
As the ion inertial length increase, the wave train becomes broader and the number of oscillation periods in the wave train are reduced.
当继续增大离子惯性长度时，波列会变得宽阔，波列中的振荡周期数目减少了。
Provided is a method for manufacturing a surface acoustic wave device by which deterioration of electrical characteristics is reduced and the number of manufacturing steps is reduced.
本发明提供一种弹性表面波装置的制造方法，能够降低电气特性的劣化，减少制造工序的工数。
The second wave of bomb attacks reduced the number of shoppers in central London by more than a quarter compared with this time a year ago, it emerged today.
该小组还表示，第二次爆炸事件给伦敦及英国其它地区的旅游业带来更加“严重的负面暗示”，伦敦市中心的购物人数较之去年同期下降了四分之一。
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