Photodimerization
光二聚
🗣️ 情景例句
Dad.
爸爸。
Friends may meet, but mountains never greet.
朋友可相逢，高山永分离。
He had been obliged to join the army during the Second World War.
年龄比他两个弟弟大很多，第二次世界大战期间被迫参军。