Unstable isotope
[电] 不稳定同位素
🧩 词语组成解析
🗣️ 情景例句
What time can you send one over?
那你们什么时候能派人来呢？
Oh, it's a shame that you have to leave.
哦，真遗憾，你非走不可呀。
But I think it's much nicer in a paper bag,in the open air!
不过我想把它放在纸袋里，在露天吃更好！