Spontaneous emission
[化] 自发发射
🧩 词语组成解析
🗣️ 情景例句
Yes, this is my youngest son Robbie.
是的 这是我的小儿子Robbie。
How many of these are you going to buy her?
你要买多少给她？
I find listening really hard. Sometimes it's just impossible to understand.
我觉得听力很难。有时简直听不懂。