stratum
US /ˈstreɪt̬.əm/
UK /ˈstreɪt̬.əm/
名词
1.
地层
one of the parts or layers into which something is separated:
示例:
•
The report shows that drugs have penetrated every stratum of American society.
在 Lingoland 学习这个单词
地层
one of the parts or layers into which something is separated: