Photonphysics
光子物理学
🗣️ 情景例句
study for my math final.
温习数学 准备期末考试。
It's pleasure to meet you.
幸会，幸会。
Then he sat there and looked at it for three hours! He didn't write a word!
然后他就坐在那里，对着考卷看了3个小时，一个字也没写！