底层
word C2- ground floor; first floor
- lowest level; lowest rung (of society etc)
From the library
古人长期习惯于在狭长的竹简上从上到下垂直书写，这种物理层面上的书写规范或许也深刻影响了底层语言的演变。
张择端不仅展现了高超的界画技巧，更倾注了对底层劳动人民生存状态的深切关注。
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