Hh
abbr. 倍硬（指铅笔心硬度 double- hard）；半硬的（Half Hard）；重氢, 氚（Heavy Hydrogen）；高功率不定向无线电归航信标（High-powered, non-directional radio homing beacon）；殿下（His Highness）；陛下（His Holiness）；阁下, 先生（His Honour）
📖 牛津释义
HH
abbr 缩写 =
1 His/Her Highness 殿下（用於他称）
HH the Prince/Princess of Wales 威尔斯亲王[王妃]殿下.
2 His Holiness 陛下（用於他称）: HH the Pope 教皇陛下.
🗣️ 情景例句
Is unable to express himself clearly.
不能很好地表达自己。
You got the wrong person.
你认错人了。
(A light year is the distance which light travels at 186,000 miles per second in one year,
一光年是光以每秒186，000英里的速度在一年内走的距离，