Read Edit View history 实体层 shítǐcéng physical layer Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 实体层/實體層 · shítǐcéng · physical layer 2026/03/04 实体层 / 實體層 shítǐcéng physical layer physical layer (OSI) 实体层是 OSI 模型中的最底层。 noun created sense Mar 4, 2026, 02:25 AM