Rotating injecting powder was doublingeffect of injecting powder and mini bubble refining.
旋转喷粉具有喷粉和微气泡精炼双重效果。
2
The crystal has the advantage of powder frequency-doublingeffect, and can not be easily deliquesced and dehydrated. Moreover, the operating conditions can be easily realized.
该晶体具粉末倍频效应，不易潮解，不易脱水等优点，操作条件易实现。
3
Doubling parental income would barely reduce dropout rates of the children. It would have a small effect on reducing teen pregnancy. It would barely improve child outcomes overall.