网络与数据通信 有线网络 释文 quadrature amplitude modulation, QAM 正交振幅调制
- urogenital papilla
- urogenital peritoneum
- urogenital plate
- urogenital sinus
- urogenital system
- urogenital system of liveustock
- urogomphus
- urohyal bone
- urohypophysis
- urokinase
- urolithiasis
- urology
- urology anorectal clamp
- urology anorectal hook & needle
- urology anorectal scissors
- urology anorectal surgical operation instrument
- uronic acid
- uropepsin
- uropepsinogen
- uropoda
- uropodite
- uroporphyrin
- uroproct
- uropygial gland
- urorectal septum