frontier
frontier/ˈfrʌntjə/n.［c］1.边境，国境；边疆: close the frontier封锁边境；a town (city) on the frontier边境城镇(市) The soldiers guarded the frontier of the country.战士们守卫边疆···
frost
frost/frɔst/n.1.［u］霜：The grass was covered with frost in the early morning.清晨草上盖满了霜。2.［u］霜冻，严寒(零下气候): Frost has killed several of our new young plants.霜冻···
frown
frown/fraun/vi.皱眉，蹙额：Why are you frowning at me like that?你为什么如此这般对我皱起眉头来?frown on/upon不赞成：His parents frowned on his staying out late.他父母亲不同意他在外···
fruit/fruitful
fruit/fru:t/n.［u］1.水果，果子［总称］：a fruit tree果树— Do you like fruit? — Yes, I eat a lot of fruit. “你喜欢吃水果吗?” “是的，吃的很多”。［注］pl.，指各种果子：What fru···
frustrate
frustrate/frʌsˈtreit/vt.1.使灰心，使恼怒而又不知所措：［考句］She was deeply frustrated by the amount of criticism her play received.比赛遭遇大量批评，这使她感到十分灰心丧气。Bot···
fry
fry/frai/vt.&vi.煎，炒，炸：fried rice炒饭；fried chicken炸鸡The eggs are frying (being fried) in the pan.鸡蛋在锅里煎着呢。
fuel
fuel/fjuəl/ I.n.燃料(［u］表示总称，［c］指不同种类)：Wood, coal, oil, and gas are different kinds of fuel.木材、煤、油和煤气是不同种类的燃料。Most ships burn oil fuel.大多数轮船以···
fugitive
fugitive/ˈfju:dʒitiv/ I.adj.逃亡的；短暂的；难捉摸的：a fugitive prisoner逃犯；a fugitive colour易褪之色；fugitive verses即兴诗‖II.n.［c］逃亡者；难以捉摸的东西：a fugitive from···
fulfil/fulfill
fulfil/fulfill/fulˈfil/vt.1.实现，履行，执行：fulfil one’s intention (ambition)实现愿望(大志)；fulfil one’s obligation完成义务；fulfil the task完成任务；fulfil a command执行命令···
full/fully
full/ful/ I.adj.1.满的，充满的：The glass is full.杯子满了。He got a full mark.他得了满分。full of…充满…的；富于…的：There is a basket full of apples in the room.屋子里有满满一篮···
