This is a stratum we must win over.
这一阶层，我们是必须争取的。
To form bends in a stratum of rock.
由岩石，尤其是水成岩组成的地层。
A thin layer or stratum, as of coal or rock.
薄薄的一层或层面，如煤或岩石的。
The stone coal is a coal resource that reserves in old stratum.
石煤是贮藏在古老地层中的一种煤炭资源。
A social stratum whose members share certain economic, social, or cultural characteristics.
阶层，阶级：一种社会层次，其成员有共同的经济、社会或文化特征。
Doctors ought to belong to a social stratum with fairly high incomes.
医生应当是社会上较高收入的阶层。
Doctors ought to belong to a social stratum with fairly high incomes.
医生应当是社会上较高收入的阶层。
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