Heptalenium
并庚间三烯离子
🗣️ 情景例句
Why don't you speak to Dad?
你们为什么不跟爸爸说说看？
I meet the boy whose aunt is a typist.
我遇到那个男孩的姑妈是打字员。
Which number do I need, please?
请问我需乘哪路车？