v.render fertile and preserve by placing between layers of earth or sand
[例]
○ stratify seeds
2.
v.form layers or strata
[例]
○ The rock stratifies
3.
v.form, arrange, or deposit in layers
[例]
○ The fish are stratified in barrels ○ The rock was stratified by the force of the water ○ A statistician stratifies the list of names according to the addresses
4.
v.divide society into social classes or castes
[例]
○ Income distribution often stratifies a society
5.
v.develop different social levels, classes, or castes
[例]
○ Society stratifies when the income gap widens
常用词组
例句
1.
The ABCD score was used to stratify the 30-day stroke risk. ABCD评分系统用于预测30天内的中风风险。
小测验：选择正确的单词
词汇听力：
