按比例分层随机抽样
Proportion allocation in stratified random sampling
按比例分配原则
proportional sharing principle
按比例分摊计算办法
method of apportionment on a pro rata basis
多重界比例分红
multiple thresholds strategy
边界分红策略
dividend barrier strategy
常数分红策略
constant barrier strategy
多重门限分红策略
multi-layer dividend strategy
阈限分红策略
threshold dividend strategy
阈值分红策略
threshold dividend strategy