Methods Non-parameter kernel density estimation method was adopted. 方法采用非参数核密度估计推断方法。
This gives you the best apples-to-apples comparison, but it involves a lot of estimation, extrapolation, and a dose of outright guesswork. 这是最为等同意义上的比较,但涉及很多估计,推断,和臆测的成分。