Calcofluor
[美]卡尔科弗卢尔(荧光增白剂)
🗣️ 情景例句
Is it too early to call Mr. Carlson?
现在打电话给Carlson先生会不会太早了？
Where is the boarding gate for this flight?
这班飞机的登机门在哪儿？
As a matter of fact, he was pretending to be ill.
实际上，他是在装病。