Ffd
[医][=focal film distance]焦点胶片距离
🗣️ 情景例句
So, it's virtually risk-free for you.
所以，事实上对您而言，是完全没有风险的。
Put (or Lay or Set) one's shoulder to the wheel.
出一把力。
My particular experience is largely in oil,
我是专门搞石油的，