Use began in the last half of the twentieth century.

在过去的二十世纪下半叶开始使用。

youdao

"I in no way anticipated the dramatic fall in energy prices that occurred in the last half of the year," he said.

“我无法预测去年下半年能源价格发生的戏剧性的下跌，”他说。

youdao

Tiny societies of pearl divers, coastal merchants, and nomadic Bedouin were transformed in the last half of the 20th century by oil and natural-gas wealth.

自二十世纪后半叶以来，在石油和天然气财富推动下，昔日的采珠人阶层、海滩商贩们和贝都因游牧部落早已改天换地。

youdao

"About half of our business is done in the last quarter of the year, in the last three months.

VOA: special.2009.12.25

Now one of the new technologies that's evolving, that we're going to talk about in the last half of the course, is taking cells that have been propagated in this way outside the body and encouraging them to form new tissues.

现在,与此相关的新技术正在蓬勃发展,我们将在这学期的后半部分讨论到它,这项技术,让细胞在体外增殖,并促使它们形成新的组织

耶鲁公开课 - 生物医学工程探索课程节选

And this is one of the major revolutions in evolutionary biology over the last half century.

这是过去半个世纪,进化生物学的重大进步之一。

耶鲁公开课 - 心理学导论课程节选

We can see this more clearly in the last half of the 19th century.

FORBES: Tariffs and Trade: The Tariff Level Isn't the Most Important Thing

In the last half of March, Treasury had a series of lousy auctions.

FORBES: Sell Treasuries, Again

An anomaly occurred in the last half of the 20th century that appeared to give cause and effect where none exist.

FORBES: The Great Age-Wave Ruse