A half-century ago,for example, producing genetic copies of animals was only a dream of scientists.
VOA: special.2010.03.23
That might not have been true a half century ago.
这在半个世纪前本无法实现。
Kingsley was fascinated by how the story explores mental health care from half-a-century ago when techniques now viewed as barbaric were commonplace.
VOA: standard.2010.02.27
When the search began, a half-century ago, it seemed sensible to assume that as technological civilization increased on a planet, more and more signals would be broadcast into space.
VOA: standard.2010.04.16
The Liberal Democratic Party suffered an embarrassing defeat in the Tokyo Metropolitan Election a few weeks ago, and it is expected to lose its half-century hold on Japanese politics in the August 30 general election.
VOA: standard.2009.07.27
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