Xanthine
n. 黄质, 黄嘌呤\\n[化] 黄嘌呤
🗣️ 情景例句
My pleasure.
不客气。
I'm not sure. I'll have to think about it.
我现在不敢说定，我得考虑一下。
It took years of hard work to speak good English.
讲一口流利的英语需要多年的刻苦操练。