Fluorexone
荧光素配位剂(由不纯品calcein制得的纯品)
🗣️ 情景例句
I'd like to live in the city,
我也喜欢住在城市，
Thank you for inviting me to speak at the dinner.
谢谢你邀请我共进晚餐。
I don't know. I think he's very old.
不知道。我想他年纪一定很大了。