...index variables, stochastic process, ageing 2 Frailty is a non-specific state of increasing ris[gap=292]关键词：脆弱，索引变量，随机过程，老化2弱者是一种非特异性的风险增加，这反映了多系统的状态 ..
When the risk is regarded as an indirectly measured latent variable which can be described by some indexvariables.
可变的数量标志和所有的统计指标称作变量。
2
Repameterizing the average tree height growth model improved the fitting results a lot by introducing site index and density indexvariables.
引入地位指数和密度指数可大幅提高林龄单因变量平均高生长模型的拟合度。
3
Some extraordinarily clever person realized that since ESP was now an index register the EBP register no longer had to be dedicated for accessing variables on the stack. In other words, instead of