stratify
/ˈstrætɪfaɪ/verb
(-ies, -ied)with obj.［usu. as adj. stratified］
1- form or arrange into strata使成层, 使分层; 分层排列：
socially stratified cities
分成不同社会阶层的城市
no obj. the residues have begun to stratify.残余物开始分层。
1.1
- arrange or classify排列; 分类, 归类：
stratifying patients into well-defined risk groups.
把病人按定义明确的危险程度进行分类。
1.2
- place (seeds) close together in layers in moist sand or peat to preserve them or to help them germinate沙藏（把种子分层紧密地放在湿沙或泥炭中保存）; 分层放 （种子）于湿沙 （或泥炭）中以助其发芽。
1.3
- no obj.(of seeds) be germinated by this method（种子）分层放于湿沙 （或泥炭）中以助其发芽。
派生词