fret
fret/fret/vt.&vi.（使）烦恼，（使）焦急；（使）腐蚀：The old lady is always fretting over something unimportant.那位老妇人总是为一些小事焦虑不安。She fretted about the cost of ···
friction
friction/ˈfrikʃən/n.［u］1.摩擦，摩擦力: Oil is put in machinery to reduce the friction.向机械里加油是为了减少摩擦力。In designing a machine it is necessary to reduce friction a···
Friday
Friday/fraidi/n.［c］星期五：Friday evening周五晚上There will be a lecture on Friday afternoon.星期五下午有个演讲会。We'll try again (on) Friday.我们周五将再试一遍。He goes the···
fridge
fridge/fridʒ/n.［c］( = refrigerator/riˈfridʒəreitə/)电冰箱：The fridge is made up of many parts.电冰箱是很多零件组成的。The food put in the fridge cannot be getting bad.放在冰···
friend/friendly/friendship
friend/frend/n.［c］朋友：one’s girl friend某人的女朋友My mother met with an old friend of hers in the train.我母亲在火车上遇到了她的一位老朋友。A friend in need is a friend indee···
fright/frighten/frightening
fright/frait/n.［u］&［c］恐怖：give him a fright吓了他一下；have/get a fright受惊吓；die of/from fright吓死I jumped up in fright.我吓得跳了起来。frighten/ˈfraitn/vt.吓唬：Did···
fringe
fringe/frindʒ/n.［c］1. (头发的)刘海，饰以流苏：curl one’s fringe卷刘海2.边缘：on the fringe of a forest在森林的边缘3.外围，次要事物：the fringes of industry次要工业部门
frog
frog/frɔɡ/n.［c］蛙：A frog has no tail.青蛙没有尾巴。Frog can live both on land and in water.青蛙既能生活在陆地上也能生活在水中。The frog plopped into the pond.青蛙扑通一声跳进池···
from
from/frɔm, frəm/prep.1.从；从…起(可表示地点和时间)：The thief jumped from the window.窃贼从窗口跳下。She has been living with her grandmother from childhood.从幼年时代起她就一直···
