A squadron of F-15 fighters is on its way home.

一个F-15战斗机中队正在返程途中。

《柯林斯英汉双解大词典》

What we would start doing immediately is taking the partial derivatives. What is f sub x?

我们首先要做的事是,求偏导数，fx是多少？

youdao

A F Here we have A as the same thing as this thing b therefore b is f.

有确定的物体，A，has，a，certain，property。,这里的A和b一样，所以b是。

youdao

A calf is a young cow. A young female cow, especially one that has not yet had a calf, is called a heifer: H-E-I-F-E-R.

VOA: special.2009.07.21

But it's just--F is just a half step away, so that's good.

也只是半音级的距离,很好

耶鲁公开课 - 聆听音乐课程节选

And so this is the H-F bond in HF.

所以这是氟化氢中的氢氟共价键。

麻省理工公开课 - 固态化学导论课程节选

Meanwhile, a high-performance model that's definitely headed to Lexus showrooms is the 2008 IS-F sports sedan.

FORBES: Magazine Article

Also sharing the spotlight was an all-new Esprit, which will make use of the 5.0-liter V8 developed by Toyota for its Lexus IS-F muscle car.

MSN: Lotus steers toward mainstream market

Although GE currently makes engines for several U.S. fighters, the future of the high-performance military engine business is the F-35 joint strike fighter, which will replace most of the tactical aircraft in the joint fleet over the next 30 years.

FORBES: Battle Over GE Engine Subsidy Reaches Climax