Dinaphthylmethane
二萘甲烷
🗣️ 情景例句
I'll have no problem.
我不会有问题。
Do you work near the airport?
你在机场附近工作吗？
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。