C-
[电] C负
🗣️ 情景例句
I have to meet my wife.
我得去接我太太。
What we learn with pleasure we never forget.
乐意学的东西决不会忘记。
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。