Spontaneous emission
[化] 自发发射
🧩 词语组成解析
🗣️ 情景例句
Are we picking him up at the station?
我们要去车站接他吗？
He lived in California until he was seventeen.
他生活在加利福尼亚直到他十七岁。
I felt very nervous when I went into his office.
我走进他的办公室，感到非常紧张。