Valence shells
[电] 价层
🧩 词语组成解析
valence
[['veiləns]]
n. 原子价\\n[化] 化合价; 原子价
n. 贝壳（shell的复数）
🗣️ 情景例句
But how did you know the party was for you?
但是你怎么知道派对是为你举办的呢？
I've had this cough for a week now.
我这样咳嗽已经一周了。
No, they aren't. They're their books.
不，不是我的。这些是他们的书。