他们研究了半个世纪以来世界各地渔业的数据。
They have looked at half a century of data from fisheries around the world.
这种运输模式的改变不可能一蹴而就，尤其是近半个世纪以来，铁路等运输模式不断萎缩，让位于公路，能实现的改变就更少了。
Such a change cannot be achieved overnight, all the less so after over half a century of constant deterioration in favour of road.
半个世纪以来，双方建立了深厚的传统友谊。
Over the past half a century, both sides have established a profound traditional friendship.
在大半个世纪以来辐照食品的技术变得愈加突出。
The technology to irradiate food has been around for the better part of a century.
加州目前正处于半个世纪以来最严重的百日咳爆发中。
California is now in the middle of the worst outbreak of pertussis in half a century.
半个世纪以来，她的绘画一直使公众感到惊异和敬佩。
Her paintings have awed and amazed the public for half a century.
半个世纪以来，路边商城一直都是郊区居民的商服中心。
FOR half a century, strip malls were the commercial heart of suburbia.
半个世纪以来，统计数字表明我们的国民不如以往快乐。
In the last 50 years, statistics have show that we are less happy as a people.
半个世纪以来，我们已经在大多数地方看到了和平胜利。
We have seen peace prevail in most places for a half century.
但半个世纪以来最严重的干旱正在影响玉米和小麦产量。
But the worst drought in half a century is hitting corn and wheat harvests.
超过半个世纪以来，单反的基本设计原理并没有太多改变。
The basic physical design of the SLR has remained essentially unchanged for over half a century.
近半个世纪以来，人们一直在筹划使用侵彻器在这些星体着陆。
Since the late half of this century, penetrators have been considered as landers on these bodies.
半个世纪以来，抽水试验方法几乎是供水勘察野外测试的唯一方法。
Since half a century, pumping test is almost the only method of the field testing for water supply investigation.
就近而言，半个世纪以来，联邦税收更像是从企业转移到了个人身上。
In short, the last half century has seen a massive shift of the burden of federal taxation off business and onto individuals.
然而半个世纪以来，我国的科学教育并不令人满意，存在诸多问题。
However, for half a century, the scientific education in our country is not satisfying and there truly exist various problems.
这个利率反映的是未来的短期利率，它已经处在半个世纪以来的低水平。
These rates, which are already at a half-century low, mainly reflect expected future short-term rates.
我国近半个世纪以来。预应力混凝土技术在公路桥梁建设中已广泛应用。
Based on the extensive application of prestressed concrete technique in highway bridge during half a century in China.
该风暴给该一些遭受了美国半个世纪以来最严重旱灾的地区带来了雨水。
The storm brought rain to some of the areas suffering from the country's worst drought in half a century.
弗雷明汉的研究发现半个世纪以来一直是心血管疾病预防政策的基本根据。
Framingham findings have been a foundation of cardiovascular disease prevention policy for a half-century.
尽管半个世纪以来，财富迅速增长，根据全国性调查，幸福感几乎没有什么增加。
And, although wealth has been soaring over the past half a century, happiness, measured by national surveys, has hardly budged.
首先，当下持续不断的干旱是半个世纪以来最为严重的一次，大有愈演愈久的趋势。
First, the ongoing drought is the worst in a half century, maybe longer.
真正令人吃惊的现象在于，半个世纪以来，他的前任一直在抵制征税或干预的诱惑。
The really amazing phenomenon is that, for half a century, his predecessors resisted the temptation to tax and meddle.
我说半个世纪以来，这个时候是富人课税负担的最低水平，我们当中最富有的人就多付一点。
I say that at a time when the tax burden on the wealthy is at its lowest level in half a century, the most fortunate among us can afford to pay a little more.
81岁的男主角由让-路易斯-特林提格南特扮演，半个世纪以来他都是法国电影中的主角。
The 81-year-old Male Lead is Jean-Louis Trintignant, a feature of French cinema for half a century.
如下图所示，消费者的信心出于半个世纪以来的最低点(除了80年的一次短暂的严重衰退)。
Consumer confidence, as our chart shows, is at its lowest in more than half a century (except for a brief sharp dip in 1980).
如下图所示，消费者的信心出于半个世纪以来的最低点(除了80年的一次短暂的严重衰退)。
Consumer confidence, as our chart shows, is at its lowest in more than half a century (except for a brief sharp dip in 1980).
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