Ffd
[医][=focal film distance]焦点胶片距离
🗣️ 情景例句
These knives are guaranteed never to go blunt.
这些刀保证不会变钝。
We are thinking of placing an order for your Flying Pigeon Brand bicycles. We would be very grateful if you could make us an offer for 200 ones with details.
我们正打算订购你方的飞鸽牌自行车。如果你们能给我们（购买200台的详细报盘将不胜感激。
We gently woke him up and asked him to ferry us to the other side.
我们轻轻地把他唤醒，请他把我们摆渡过溪。