Hdo
abbr. hydrogen-deuterium-oxygen 重水; heavy diesel oil 重柴油; half-duplex operation 半双工操作; horizontal deflection oscillator 水平偏转振荡器
🗣️ 情景例句
Who?
谁啊？
I'd like to travel first-class.
我要头等舱。
He made up his mind to once again ask for her hand in marriage.
他下决心再一次向他求婚。