Calcofluor
[美]卡尔科弗卢尔(荧光增白剂)
🗣️ 情景例句
It's no use crying over spilt milk. What's done cannot be undone.
覆水难收。
How are you feeling today?
今天你觉得舒服吗？
When the dentist at last removed the cotton wool from my mouth,
当那位牙医最后将药棉从我嘴中取出时，