Heptalenium
并庚间三烯离子
🗣️ 情景例句
If you know a man's last name, address him as 'Mr.'.
如果你知道一个男性的姓， 应该用 'Mr。' 来称呼他。
It really hurts.
可真疼。
'This is a private conversation!'
“这是私人间的谈话！”