1.
Probably about one in three.
大概是三分之一吧，
2.
May be one in three.
大概是三分之一吧.
3.
The rate of success is one in three.
成功率是三分之一。
4.
One third of the population be townsmen and two thirds countrymen
三分之一的人口是住在城里,三分之二住在乡下
5.
One third of the population were townsmen and two thirds countrymen.
三分之一的人口是住在城里,三分之二住在乡下。
6.
The queues often consisted of one part of people to two parts of inanimate objects.
队里常常是三分之一的人，三分之二的物品。
7.
An interval of a third.
三音三分之一的间隔时间
8.
The two spacecraft got within one-third of a meter of each other.
两艘宇宙飞船之间只相隔三分之一米，
9.
One-third to one-half of the earth's population is undernourished
世界上有三分之一到二分之一的人口营养不良，
10.
one half to one third of the population was lost to the Black Death.
有三分之一到一半的人死于黑死
11.
One third of the senators are elected every two years.
三分之一的叁议员每两年改选一次。
12.
One third of this area is covered with forest.
这一地区三分之一的地方都是森林。
13.
Scholastic Record: For 3.5 years I have been in the upper third of my class scholastically;
学习成绩：三年半，成绩名列全班的前三分之一。
14.
Would Oxford get three times the sales at one-third the cost?
牛津词典以三分之一的价钱能多销三倍吗?
15.
1/2, 1/4, and 2/3 are fractions.
二分之一、四分之一和三分之二都是分数。
16.
What does this 1, 2 or 3 per cent really mean?
什么叫百分之一、二、三呢？
17.
A day is about one thirtieth of a month.
一天大约是一个月的三十分之一。
18.
One second of arc movement is one thirtieth of a millimetre.
一弧秒的移动是一毫米的三十分之一。