Pantolactone
[化] 泛內酯
??? 情景例句
What books are required for this class?
這課需要什么樣的書？
He has a book.
他有一本書。
I crossed the street to avoid meeting him, but he saw me and came running towards me.
我穿過馬路以便避開他，但他看到我并朝我跑過來。