Htc
abbr. 热传导系数（Heat Transfer Coefficient）
🗣️ 情景例句
I got a Dear John letter from her.
我收到她的绝交信了。
Do you get much rain in summer?
这里夏天雨水多吗？
namely 6 million million miles.) Radio waves also travel at the speed of light,
即6万亿英里）。无线电波也是以光速传播的。