Petzval theory
[医] 珀兹伐氏学说(镜片像散现象)
🧩 词语组成解析
佩兹伐
🗣️ 情景例句
Yes? May I help you?
什么事？我能为您效劳吗？
In universities,students train to become teachers and engineers.
在大学里，学生们被训练成为教师和工程师。
She has no money and no place to live.
她没钱，也没地方住。