Xanthopterin
黄蝶呤, 2-氨基-4, 6-二羟基蝶呤
🗣️ 情景例句
I don't have the heart to tell her.
我没有勇气告诉她。
The following answer is subject to official confirmation.
以下的答案必须再经过正式确认才有效。
What time will the next train leave?
下一班火车什么时候开？