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
Mom and Dad are already on their way down to the gallery.
妈妈和爸爸已经出发去画廊了。
You cannot have two forenoons in the same day.
一日之中不可能有两个上午。
The meeting was scheduled for two hours, but it is not over yet.
会议原定了两个小时，不过现在还没有结束。