Xanthopterin
黄蝶呤, 2-氨基-4, 6-二羟基蝶呤
🗣️ 情景例句
His actions express his love more than any words could do.
他用行动表示的爱胜过任何言语。
Is the plane leaving?
飞机要起飞了吗？
Sam's here.
萨姆来了。