Xanthopterin
黄蝶呤, 2-氨基-4, 6-二羟基蝶呤
🗣️ 情景例句
Hi, it's nice to meet you.
你好，很高兴见到你。
I live at 1203 Washington Street.
我住在华盛顿街1203号。
Oh dear! It's very cold today, isn't it?
天哪，天真冷，不是吗？