Ffd
[医][=focal film distance]焦点胶片距离
🗣️ 情景例句
Ooh, speaking of keeping busy-I have an early start tomorrow,and the baby-sitter has to get home.
哦， 说到忙于工作，我明天还得早起，而且临时保姆也该回家了。
We have 50 provinces.
我们有50个省。
There is a mark of ink on his shirt.
他的衬衣上有一块墨迹。