Pentacetate
五乙酸盐
🗣️ 情景例句
But the only time he's available this week
但这星期他有空的时间只有
A secret between more than two is no secret.
两人以上知道的秘密就不算秘密。
It was the last day of the year and a large crowd of people had gathered under the Town Hall clock.
那是一年的最后一天，一大群人聚集在市政厅的大钟下面。