Jiù shèhuì bǎ xiàděng rén shì wéi méiyǒu quánlì de jiēcéng.
The old society regarded lower-class people as a stratum with no rights.
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usage
下等 contrasts with 上等 (shàngděng, superior/high-grade) and 中等 (zhōngděng, middle-grade). It can describe quality of goods, social class, or rank in a hierarchy. In modern contexts it is most often applied to products and materials.