Pholocatalyst
[医] 光催化剂
🗣️ 情景例句
It's on the house.
这是免费的。
Christmas comes but once a year.
佳节良辰，机会难得。
My friend, Robert, lives in a country where snails are despised.
但我的朋友罗伯特却住在一个厌恶蜗牛的国家中。