Tom Cruise is not the leading actor in this movie so you only see him for a fraction of the time.汤姆•克鲁斯不是这部电影的主角，所以你会看到他在电影里只出现了很短的时间。

If you convert 0.25 into a fraction you get 1/4.如果将0.25换算成分数，就是1/4。

fragment n.碎片，破片

The glass fell on the floor and broke into fragment.那块玻璃掉在地板上，摔成了碎片。

freight n.货物；货运vt.装货；运送

The company is responsible to send the freight to you by truck.公司负责用卡车把货私运送给你。

Grapes from this region areall over the world.这个地区出产的葡萄被运送到世界各地。

friction n.①摩擦②冲突，不和

The wheel has been worn smooth due to friction.由于摩擦，车轮已经被磨平了。

At this time when harmony is essential, we cannot afford to have any fricton in our group.这个时候，和谐才是最重要的，因此我们小组再也不能产生任何冲突了。

frost n. 霜；霜冻

Matt had to clean the frost off his car windows before he could drive.开车之前要先把车窗上的霜清除掉。

The windscreen of my car frost over during the night.在夜间，我的汽车挡风玻璃结冰了。

frown vi.皱眉；不赞成，反对

Smoking is frowned upon in many restaurants.许多餐厅不允许吸烟。

frustrate v.①挫败，破坏②使沮丧

The warden frustrated the prisoners' attempt to escape by adding more guards.监狱长增加了更多守卫，让囚犯们越狱的图谋落空了。

What frustrated her was that she did not get a high score on the final test.令她沮丧的是自己在最终测试没得到高分。

fuel n.燃料 燃料；激起

The scientist predicted America would run out offuel within 20 years.科学家预测，美国将在20年内耗尽燃料。

Quit arguing with Bao! You’ll only fuel his anger.别跟包争论了！你这样只会让他更加愤怒。

functional adj.功能的；有用的

My bike is not luxurious，but it is still functional.我的自行车不算高级，但功能依然完好。

fundamental adj.基础的，基本的

The refugees were too poor to meet their fundamental needs for life.难民太穷了，甚至连自己生活的基本需求都无法满足。