Xanthopterin
黄蝶呤, 2-氨基-4, 6-二羟基蝶呤
🗣️ 情景例句
I find it amazing that you can't swim.
你不会游泳可真使我大吃一惊。
We waved until the car was out of sight.
我们挥手直到汽车消失。
Excuse me! Are you Mr. Green?
请问，您是格林先生吗？