Number Twelve is everywhere. we use the number twelve to help us do things every day. it helps us to count things. measure length, and tell time.
12号到处都是。我们用数字12来帮助我们做事情每天。它能帮助我们数数。测量长度，认识时间。
Did you ever wonder why a year has twelve months? a ruler has twelve inches? a clock has twelve hours?
how we learned to count
long ago, people needed an easy way to count things. how many goats did they have? how many bricks did they need?
你有没有想过为什么一年有十二个月？尺子有12英寸？时钟有十二个小时？
我们是如何学会数数的
很久以前，人们需要一种简单的计数方法。他们有多少只山羊？他们需要多少块砖？
They didn't have pencils, but they always had their fingers. how could their fingers help them count things? your hand has four fingers and one thumb. fingers bend into three parts. all of your finger parts add up to -twelve.
他们没有铅笔，但他们总是有自己的手指。他们的手指怎么能帮他们数东西呢？你的手有四个手指和一个拇指。手指弯曲成三部分。你所有的手指部位加起来是-12。
To learn how people counted, use the thumb of your other hand. count the parts of each finger. one two three, four, five six... using their finger, people could count their farm animals. they might count six chickens, three sheep and three goats. they had twelve animals.
要了解人们如何计数，请使用另一只手的拇指。数一数每个手指的部位。一二三，四，五六。。。人们可以用手指数数农场里的动物。他们可能数到六只鸡、三只羊和三只山羊。他们有十二只动物。
when their animals had bobies. it was easy to count them, too. using count to twenty-four, twenty-four is two twelves. a ruler is twelve thumbs long fingers. and the number twelve, were also used to find length. an inch was the width of an adult man's thumb. a foot was twelve thumbs long.
当他们的动物有小动物的时候。数一数也很容易。用计数到24，24等于2个12。尺子是十二个大拇指长的手指。数字12也被用来计算长度。一英寸是成年人拇指的宽度。一英尺有十二个拇指长。
Soon, people cut twelve marks for thumb widths on a stick. it was easy to carry the stick. that stick was the first kind of twelve inch ruler.
twelve hours in a day
people used the number twelve to divide their days into parts or hours, that they could count. in daylight, they watched the shadow of a stick or a sundial to know what hour it was.
很快，人们在一根棍子上刻了12个拇指宽度的记号。这根棍子很容易拿。那根棍子是第一种12英寸的尺子。
一天十二小时
人们用数字12把一天分成几个部分或几个小时，这样他们就可以数数了。在白天，他们观察木棍或日晷的影子，以了解现在是什么时候。
Twelve things are also called a dozen. we buy a dozen pencils in a box. we buy a dozen doughnuts or a dozen eggs. the number twelve helps us to do a dozen things every day.
十二件东西也叫一打。我们买了一盒12支铅笔。我们买一打甜甜圈或一打鸡蛋。数字12帮助我们每天做一打事。
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