A half-century ago,for example, producing genetic copies of animals was only a dream of scientists.

VOA: special.2010.03.23

In the second half of the twentieth century and up now into the twenty-first century, writers were thinking very hard about what to do stylistically with all the innovations that come in that powerful period known as modernism.

自二十世纪下半叶,直至现今二十一世纪,作家都在努力思考在现代主义影响,深远的这个时期里该怎样进行文体上的创新。

耶鲁公开课 - 1945年后的美国小说课程节选

The Dead Sea lost thirty-three percent of its surface area during the last half-century.

VOA: special.2009.05.18

The numbers of basking sharks have been decreasing for the past half-century.

VOA: special.2009.06.16

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

(Sound) Astrix' half-century birthday is being celebrated around France with special exhibits and other commemorations.

VOA: standard.2009.10.22

After a half-century,the search for extra-terrestrial intelligence, or SETI, has pretty much come up empty.

VOA: standard.2010.04.16

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