Unstable nucleus
[电] 不稳定核
🧩 词语组成解析
🗣️ 情景例句
Think no more of it.
别再想它了。
Why didn't you go?
为什么你不去？
'He had travelled only seven miles across the Channel when his engine failed and he was forced to land on sea.
但他只在海峡上空飞行7英里，引擎就发生了故障，他只好降落在海面上。