Pentadecalactone
[建] 十五酸内酯
🗣️ 情景例句
Robbie, would you bring the dessert plates.
Robbie，你把甜点盘子拿来好吗？
It is easy to open a shop but hard to keep it always open.
开设店铺易，维持常开难。
Together we repeated and repeated words and sentences.
我们一道反反复复地说词语和句子。