文学 页面描述语言 释 page description language；PDL 页面描述语言 对页面内的各种信息元素的属性、特征、行为以及页面元素之间的相互关系进行描述的计算机语言。
系统软件 语言与编译 释文 program design language, PDL 设计程序语言
- frequency
- frequency-agile radar
- frequency allocation
- frequency analysis
- frequency and duration method
- frequency approach
- frequency attribute
- frequency band
- frequency bandwidth constraint
- frequency bridge
- frequency calibration
- frequency capture
- frequency centre
- frequency characteristic
- frequency characteristic of sound pressure
- frequency chart
- frequency chirp
- frequency coding
- frequency collapse
- frequency comparision
- frequency compensation
- frequency conversion
- frequency conversion circuit
- frequency conversion technique
- frequency conversion transformation of fan and water pump