Photodimerization
光二聚
🗣️ 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？
We waved until the car was out of sight.
我们挥手直到汽车消失。
Thank you. said Meimei.
“谢谢你，”梅梅说。