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 page description language 页面描述语言
- helioscopicocular
- helioseismology
- heliosheath
- heliosphere
- heliospheric energetic particles
- Helios Probe
- Helios satellite
- heliosta field
- heliostat
- heliotail
- heliotaxis
- heliotherapy
- heliotrope
- heliotropism
- heliotype
- helipot
- Heli Shan
- helitack
- helitron
- helium
- helium-3
- helium-3 A phase
- helium-3 B phase
- helium-3 detector
- Helium 3 proportional counting tube