Xanthopterin
黄蝶呤, 2-氨基-4, 6-二羟基蝶呤
🗣️ 情景例句
and I love being here with the family,
而我也喜欢和家人在一起。
Every little makes a mickle.
积少成多。
London is on the river Thames.
伦敦位于泰吾士河边。