Lactonic ketone
[機] 內酯
?? 詞語組成解析
a. [化]內酯酸的, 無水氫氧酸類的
ketone
['ki:to?n]
n. 酮;
??? 情景例句
and they lived in New York.
而他們住在紐約。
If it is left too long, it begins to give off a bad smell.
假如把它放得太久了，它就會開始發臭。
Hi! Nice to meet you, too!
我也很高興見到你。