Xanthines
(xanthine 的第三人称 -s形式) n. 黄质, 黄嘌呤\\n[化] 黄嘌呤
🗣️ 情景例句
I was teaching music,
我当时教音乐，
Losses make us more cautious.
损失使人更谨慎。
Its origin is still a mystery now.
它的起源至今仍是个谜。