Past three decades have witnessed the evolution of the computer.
过去的三十年见证了计算机的发展。
In the early spring three decades ago, Mount St. Helens began to rumble.
在三十年前的早春，圣海伦斯山开始轰鸣。
Advances in technology might make Antarctica a lot more accessible three decades from now.
科技的进步可能会让三十年后的人们更容易到达南极洲。
The percentage of retirement-age people in the labor force has doubled over the past three decades.
过去三十年来，退休年龄人口在劳动力中的比例翻了一番。
Over the past three decades, the industry has made some efforts to improve the quality of its offerings.
在过去的三十年里，这个行业为了提高其产品的质量做了一些努力。
It has consequences: South Africa's ongoing drought—the worst in three decades—will cost at least a quarter of its corn crop this year.
它的后果是：南非持续的干旱——三十年来最严重的干旱——将导致它今年至少四分之一的玉米作物受损。
About three decades ago, China was known as the "bicycle kingdom".
大约30年前，中国被称为“自行车王国”。
A new data shows that the global AIDS pandemic will cause a sharp drop in life expectancy in dozens of countries, in some cases declines of almost three decades.
一项新的数据显示，全球艾滋病疫情将导致数十个国家的预期寿命大幅下降，在有些国家寿命减幅近30年。
Over the past three decades, the number of students leaving home each year to study abroad has grown at an annual rate of 3.9 percent, from 800,000 in 1975 to 3.5 million in 2008．
在过去的30年里，每年出国留学的学生人数以每年3.9%的速度增长，从1975年的80万人增长到2008年的350万人。
For three decades REM evolved.
REM三十年来不断变化。
In the past three decades their Numbers have doubled.
在过去30年中，他们的人数翻了一番。
It took another three decades before a flying sub appeared for real.
又过了三十年，一架真正的飞潜艇才出现在人们眼前。
Sichuan earthquake: China's worst natural disaster in three decades.
四川地震：中国三十年来最严重的自然灾害。
Sure, it was just a few hours here or there... but over three decades.
可能看起来不过是每天扣去的三五个小时，但是三十年下来呢？
That would roughly match global emissions over the past three decades.
这个数字大致相当于过去30年中的全球排放量。
It is already three decades since Richard Nixon declared war on cancer.
自从理查德·尼克松(Richard Nixon)同癌症宣战以来已经有30年了。
Outbreaks are a much larger menace today than they were just three decades ago.
疾病的暴发如今比在三十年前更具威胁。
Per capita food grain availability has shrunk to what it was three decades ago.
人均粮食拥有量比三十年前还少。
That has been the story of parts of the Third World over the past three decades.
这已经在过去的三十年间在部分第三世界国家一再上演。
Maybe after two or three decades, I'll have more readers, but it's too early now.
也许20年或者三十年后，我会有更多读者，但现在还是太早了。
This week shares in Hitachi and NEC fell to their lowest levels for three decades.
本周日立和NEC的股票都创下三十年来的新低。
This week shares in Hitachi and NEC fell to their lowest levels for three decades.
本周日立和NEC的股票都创下三十年来的新低。
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