Old quantum theory
[化] 前期量子论
🧩 词语组成解析
old
[old]
adj. 老的;古老的;以前的;（用于指称被替代的东西）原来的;
n. 古时;
🗣️ 情景例句
What are you gonna do now?
你打算做什么？
Sure. We are friends since primary school.
当然，我们从小学就是朋友了。
He called out to the children and threw the ball back to the bank.
他大声叫着那些孩子，把球扔回到岸上。