chapter 4 the world of numbers数字世界。
一、词汇。everyone,s language stand forat leaststart form
每个人的语言代表至少从。。。开始。
in ancient timesin many different ways do a calculation in tens
古时候用许多不同的方法计算用十进制。
in a flashthe system of numbers decimal number consist of
一瞬间，迅速数字系统小数包括，由。。。组成。
even numberfrom1 to 9odd numberwrite it down
偶数，双数从1到9奇数，单数写下。
calculating machines very powerfulsquare rootspay attention to
计算机很强大平方根注意。
the intenational language of numbers one of the first calculating machines different kinds of
国际通用的数字语言最早的计算工具之一不同种类的。
a kinds of modern electronic calculators your partner,s mind make a mistake with
一种现代电子计算器你同伴的想法出错。
receive…from a group ofword out traffic accidents in figures
从。。。收到一组、一群算出交通事故以数字的形式。
in words
以文字的形式。
二、同义句。
1、in ancient times=long long ago=once upon a time在古代、很久以前。
in ancient times,people used stones as money.= long long ago,people used stones as money.
很久以前，人们用石头代表钱once upon a time,people used stones as money.
2、at least=not less than至少 there are at least than 20 students in the meeting room.
会议室里至少有20个学生there are not less than 20 students in the meeting room.
3、however=but然而，但是。 it was raining went out to look for the boy.
it was raining we went out to look for the boy.
4、almost=nearly差不多，几乎。 it is almost time to go aboard.=it is nearly time to go aboard.
5、consist of=include=be made up of=h**e由。。。组成 this machine includes many parts.
this machine consists of many parts.
this machine is made up of many parts.
6、so…that=too…to…=not….enough…如此。。。以致于。。。太。。。而不能。。。不足够。。。去做。
my brother is so young that he can,t drive a car. 我的弟弟如此年少以致于他不能开车。
my brother is too young to drive a car.我的弟弟太小而不能开车。
my brother is not old enough to drive a car.我的弟弟年纪不够大去开车。
7、start…with=begin…with开始。。。pupils start learning chinese with bopomofo.
pupils begin learning chinese with bopomofo.
8、one of+名词复数=among the+名词复数 。。其中的一个。
sue is one of the top students in our school.=sue is among the top students in our school.
9、start from=begin from从。。。开始 let,s begin from the first student.
let,s start from the first student.
10、stand for=represent=mean代表the hearts stand for love.=the hearts represent love.
= the hearts mean love.
11、in a flash=very quickly=in a very short time瞬间。
he swallowed the whole steamed bread in a flash.= he swallowed the whole steamed bread very quickly.
他一瞬间吞下整个馒头he swallowed the whole steamed bread in a very short time.
12、why not do sth?=why don,t you do sth?为何不做某事？
why not go and ask your teacher for help?= why don,t you go and ask your teacher for help?
13、buy sb sth=buy sth for sb为某人买某物。
my father bought me an encyclopaedia（百科全书）on my birthday.
my father bought an encyclopaedia（百科全书）for me on my birthday.
14、hurry up=be quick.赶快 be quick! we h**e little time.=hurry up! we h**e little time.
the first time.发明。
who invented the car?=who make the car for the first time?
any mistakes精确地。
i think computers can calculate accurately.=i think computers can calculate without any mistakes.
17、turn left at the second turning.=take the second turning on the left.在第二个路口身左转。
18、where is the happy valley?=can you tell me which is the way to the happy valley?欢乐谷在哪？
19、subtract 2 from 3,and you,ll get 1.=3 minus 2 equals/is 1. 3减2等于1.
20、multiply 2 by 3,and you,ll get 6.=2 times 3 equals/is 6. 2乘以3等于6.
21、two plus three is five.=two and three equals five.=add two to three,and we get five.
2加3等于5.
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