Echelogram
阶梯光谱照片
🗣️ 情景例句
Bye, see you next time.
下回再见。
He is a wise man who speaks little.
聪明的人话不多。
It is our satellite. It is quite near us in space.
它是我们的卫星。它离我们相当近，仅38万公里远。