2533.radio(名)收音机
we can listen to music by radio.
我们能透过收音机听音乐。

2534.railroad(名)铁路
美式
Tha railroad runs across the plain.
铁道穿过平原。

2535.railway(名)铁路
英式
He engineered a railway．
他设计过一条铁路。

2536.rain(名)雨(动)下雨
(名):After rain comes fair sunshinei.
雨过天晴。
(动):It rains a lot this year.
今年雨下很多。

2537.rainbow(名)彩虹
Look! What a beautiful rainbow!
瞧，多漂亮的彩虹！

2538.raincoat(名)雨衣
He had no raincoat on when the rain started.
开始下雨时他没穿雨衣。

2539.rainy(形)下雨的、多雨的
Last week was very rainy;rain fell every day.
上星期多雨，每天都下雨。

2540.range(动)涉及(名)范围、区域
(动): Our conversation ranged over many tapics.
我们的谈话涉及很多问题。
(名):Do you know the range of final?
你知道期末考的范围吗？

2541.rapid(形)迅速的、快的
Growth is rapid in infancy.
幼儿期的成长相当快。

2542.rapidly(副)迅速地
His health degenerates rapidly.
他的健康迅速恶化。

2543.rat(名)老鼠
比mouse大
The cat nosed out a rat.
猫嗅出有一只老鼠。

2544.rate(名)速率；比率
The rate of inflation decreased t0 10% last year.
去年通货膨胀率降低为百分之十。

2545.rather(副)相当地；与其……不如
Rathar than causing trouble，he left．
他不愿意惹麻烦，宁可离开。

2546.reach(动)到达；伸手；打动心坎
By 2008, that figure is expected to reach 7 million.
到2008年，这一数字预计将达到七百万。

2547.read(动)读；研究
不规则变化read，read
I can read French but l can't speak it.
我能看懂法文，但不会说。

2548.reader(名)读者、读书人
That book suits general readers most．
那本书最适合一般读者。

2549.readily(副)迅速地
Wherever he goes, he rendily accommodates to changed conditions.
不管到哪儿，他都能迅速适应变化的情况。

2550.reading(名)读物；学识
Reading makes a full man.
阅读使人充实。

2551.ready(形)准备好的；乐意的
He is always ready to help his claasmates with their lessons.
他总是乐于帮助同学们复习功课。

2552.real(形)真实的
WN didn't believe their threats for real．
我们不相信他们的威胁是真的。

2553.reality(名)现实、真实性
Millions of people live with the harsh realities of unemployment.
数以百万计的人们正活在失业的严酷现实中。

2554.really(副)真正地
The government's new higher taxes are really beginning to bite．
政府提高税收的新措施真的开始引起不满了。

2555.reason(名)理由
The reason that she did it is still a mystory.
她为什么做那件事仍是一个谜。

2556.reasonable(形)合理的、有理由的
反义词unreasonable
They advanced many reasonable proposals.
他们提出了许多合理化的建议。

2557.reasonably(副)合理地
You are not behaving reasonably．
你的行为不合情理。

2558.rebuild(动)重建
The house was rebuilt after it was hit by a bomb．
这栋房子在被炸弹击中后重建。

2559.record(名)前科;记录(动)记录、录音
(名): The doctor keeps a record of all the sarious illnesses in the village.
这个医生保存了这个村庄所有严重疾病的记录。
(动): Would you please record the speech?
你可以帮忙记录这场演讲吗？

2560.recorder(名)答录机；记录者
Where shall put the recorder?
我该把答录机放在哪里？

2561.recording(名)录音
Don't fool with the recording equipment．
别瞎弄录音设备。

2562.recycle(动)使回收、使再循环
We must recycle the cardboard boxes．
我们必须将纸盒子回收。

2563.red(形)红色的
The little girl's eyes were red with weeping．
那个小女孩哭得两眼通红。

2564.region(名)地区
l prefer to live in a cold region.
我宁愿住在寒冷的地区。

2565.regional(形)区域性的、地区的
Most regional committees four time a year．
大部分地区委员会每年开会四次。

2566.regular(形)定期的；整齐的；正常的
反义词irregular
Evarything seemed quite regular when the fire broke out.
当火起的时候，一切似乎都很正常。

2567.regularly(副)定期地
Both girls write to each other regularly now.
两个女孩正在定期互相通信。