Pentadecanone
十五烷酮
🗣️ 情景例句
Yes, I do.
是的， 我是这个意思。
It's time for me to get up.
是我起床的时间了。
They were expecting their sixth child and were faced with even more pressing economic problems.
第6个孩子即将问世，他们面临着更为严峻的经济问题。