Calcofluor
[美]卡尔科弗卢尔(荧光增白剂)
🗣️ 情景例句
Do you think I have enough to show him?
觉得我有足够的照片给他看吗？
If you want to be healthy, you have to stop smoking cigarettes.
如果你要身体健康的话，必须停止抽香烟。
Yes, they are.
对，这些是英语书。