Pentacetate
五乙酸盐
🗣️ 情景例句
I'm a freelance photographer.
我是自由摄影师。
Please send your report to me at the office by Monday.
请于周一以前将报告送到我的办公室。
I am not sure such data does exist.
我不确定是否有这样的资料存在。