Ffd
[医][=focal film distance]焦点胶片距离
🗣️ 情景例句
It might be simpler and less expensive .
这样可能比较简单而且省钱。
Jeff was not pleased with his school grades.
杰夫不满意自己在学校的成绩。
I'm going to give her a book.
我想送她一本书。