1629.fifth(形)第五的
I stroll down Fifth Avenue.
我漫步在第五大道上。

1630.fifty(形)五十的
I have fifty things to tell you.
我有许多话要对你说。

1631.flight(动)打架、与……斗争
不规则变化fought, fought
You may have to fight people who cheat with their own weapons.
你可能得用骗子的手段来对付骗子。

1632.fighter(名)战士；战斗机
Now all the fighter planes are all armed with cannon.
现在所有的战斗机都装备了机关炮。

1633.final(形)最后的
The headmaster has the final say.
校长有最终决定权。

1634.finally(副)最后；完全地
Their dispute has not finally settled yet.
他们之间的争端尚未彻底解决。

1635.find(动)发现、找到
不规则变化found, found
Please find out what time the delegation will come.
请查一查代表团什么时候来。

1636.finding(名)发现；调查结果
Surveys conducted in other countries reported similar findings..
在其他国家进行的调查也报告说有类似的结果。

1637.fine(动)处……以罚金(形)美好的；健康的(名)罚金
(动):They fined him heavily for breaking the speed limit.
他因超速而被他们重罚。
(形):I am fine.
我很好。
(名):The fine is 300 dollars.
罚金是300元。

1638.fineness(名)精美、细致
The fineness and softness of the dress caught her attention.
这件裙子的精致和柔软引起了她的注意。

1639.finger(名)手指
His fingers are all thumbs.
他笨手笨脚。

1640.fingernail(名)指甲
It takes about 150days to grow out a full length fingernail.
大约150天的时间就可以长一个完整的指甲出来。

1641.fingerprint(名)指纹
About this robbery, the police have only one fingerprint to hang onto.
关于这起抢劫案，警员唯一能凭借的就是一枚指纹。

1642.finish(动)结束
后接动名词
When does he finish his callege course?
他何时大学毕业？

1643.fire(名)火
He who plays with fire gets burned.
玩火者必自焚。

1644.first(形)第一的
If you send your letter first class, your parents will receive it tomorrow afternoon.
要是你按第一类邮件寄，你的父母明天下午就能收到了。

1645.fish(名)鱼类(动)钓鱼
(名):All is fish that comes to his net.
来者不拒。
(动):Let's go fishing.
我们一起去钓鱼吧。

1646.fisherman(名)渔夫
The fisherman's float bobbed on the waves.
渔夫钓鱼线上的浮标随着波浪上下跳动。

1647.fishery(名)渔业；渔场
Steady progress was made in animal husbandry and fishery industry.
畜牧业和渔业生产稳定发展。

1648.fishing(名)钓鱼
Fishing is my favorite sport.
钓鱼是我特别喜爱的一项运动。

1649.fit(形)适合的
反义词unfit
The food was not fit for human consumption.
这种食物不适宜人食用。

1650.fitting(形)适合的
It is fitting that you should return his call.
回他电话是很适当的。

1651.five(形)五
Five cubed is one hundred and twenty-five.
5的立方等于125。

1652.flight(名)航程
They met on a flight to Australia.
他们在飞往澳大利亚的航班上相遇。

1653.flood(名)水灾、洪水
In 1975, the floods in that area made 233,000 people homeless.
1975年该地区的洪水使得233.000人无家可归。

1654.floor(名)地板
There's broken glass on the floor.
地上有玻璃碎片。

1655.flower(动)开花(名)花朵
(动):This plant flowers in late summer.
这种植物在夏末开花。
(名):Bees gather nectar from flowers.
蜜蜂采集花蜜。

1666.flowerbed(名)花床
He put his great foot on the flowerbed.
他的大脚踩在花床上。

1657.flowerpot(名)花盆
I'm trying to put the flowerpot on the windowsill.
我想把这个花盆放到窗台上。

1658.flu(名)流行性感冒
influenza的缩写
Lung fever develops from flu.
肺炎是由流行性感冒引起的。

1659.fly(动)飞行(名)苍蝇
不规则变化flew,flown
(动):This bird has a broken wing and can't fly.
小鸟的一只翅膀断了，飞不起来了。
(名):Can you see the flies here?
你看到苍蝇了吗？

1660.fog(名)雾气
Bad fogs are common in November.
十一月多雾的日子很常见。

1661.foggy(形)多雾的
Foggy weather has made driving conditions very dangerous.
雾天开车很危险。

1662.follow(动)跟随
Pain is forgotten where gain follows.
一朝得了利，痛苦便忘记。