Donor atom
[化] 供电子原子; 配位原子
🧩 词语组成解析
🗣️ 情景例句
He's upset over the fact that he wasn't promoted this year.
他对今年没有升迁感到恼怒。
They used to live there, didn't they?
他们过去住在哪里，不是吗？
Don't worry! We won't leave before nine. We'll wait for you outside the school gate!
别担心！9：00前我们不会出发。我们将在学校的大门外等你！