Ketoheptose
庚酮糖
🗣️ 情景例句
Butter, nice and cold and hard.
牛油 新鲜又冷又硬。
He who rides a tiger is afraid to dismount.
骑虎者难下。
Quite by accident. I moved a few peas and there it was.
很偶然。我挪了几颗青豆就发现了。