Obbo
[美]观测气球
🗣️ 情景例句
After my wife died,
我妻子去世后，
Truth's best ornament is nakedness.
不加装饰是真理的最好的装饰。
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。