Heptalenium
并庚间三烯离子
🗣️ 情景例句
Can you give me a hand with my homework?
你能帮忙教我做家庭作业吗？
Just to be on the safe side.
为安全起见。
The guest who arrives half an hour too soon is the greatest nuisance.
客人提前半小时到达是令人讨厌的。