Tonga
[医] 雅司病
🗣️ 情景例句
I hear Max.
我听到Max哭了。
Which one is more difficult?
哪一个是比较难的？
It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951;
这个频率是空间氢原子释放的自然频率，是在1951年被人类发现的。