Retinal
a. 視網膜的\\n[化] 視黃醛
??? 情景例句
Great. What's happening with you these days?
非常好。你最近幾天怎么樣？
What a mess!
亂七八糟。
Each day is a holiday,and ordinary holidays, when they come,
每天都是假日，而通常的假期到來時，