Pirca
皮尔卡(一种古石砌干墙)
🗣️ 情景例句
Talk it over. Think it over. Let me know by the end of the week.
好好地谈一谈。好好地想一想。这个周末以前让我知道你的决定。
Have you got any plans?
你有什么计划吗？
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。