Hpa
abbr. 高功率放大器（high-power amplifier）
🗣️ 情景例句
I believe my English fluency is quite good.
我认为自己的英语相当的流利。
The telephone is ringing,would you answer it,please?
电话正在响,你接吗？
but where had it come from?
但它是从哪儿来的呢？