Pentaoxacyclooctadecane
[化] 五氧杂环十八烷
🗣️ 情景例句
Nice day, isn't it?
天儿真不错，你说呢？
His heart swelled with gratitude to her.
他心中充满着对她的感激之情。
Let us be calm, gentlemen.
先生们，请安静。