p-p 📖 中文释义 abbr. pee-pee (urine) 小便; peak-to-peak 从最大值到最小值; pellagra-preventive factor 抗糙皮病因子; push-pull 推挽式的 🧩 词形变化 ← p-nitrotoluene-o-sulfonic acid 4- p-p-tetramethyldiaminodiphenylmethane →