stratify|stratified|stratifies

这个实验要求我们将不同密度的液体分层排列。

This experiment requires us to ___stratify liquids of different densities.

这个国家的教育体系高度分层，不同阶层的孩子进入不同的学校。

The country's education system is highly ___stratified, with children from different social groups attending separate schools.

这家公司按照员工的资历和经验分层管理。

The company ___stratifies its employees based on seniority and experience.