Fluorexone
荧光素配位剂(由不纯品calcein制得的纯品)
🗣️ 情景例句
I would like to improve my English pronunciation.
我想改善我的英语发音。
How many yards are you going to get?
你要取几码？
Would you like to do that now?
你要现在就讨论吗？