Levulinamide
4-氧(代)戊酰胺
🗣️ 情景例句
You've met my wife Marilyn ...
你曾经见过我太太Marilyn……
Which of your arms is sore?
你哪个手臂酸呀？
Yes, they're our new reading books. Is the box too heavy?
对，这些是我们的新教科书，这个箱子重吗？