The cultivation of crops has expanded into progressively drier regions as population densities have grown.

随着人口密度的增长，农作物的种植已经扩展到了越来越干旱的地区。

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It's still incredible how the World Wide Web has expanded in twenty years, and how much we now rely on it.

万维网在二十年里是如何发展壮大的，以及我们现在对它的依赖程度之大，这些仍然令人难以置信。

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Thompson's business was originally modest in size, but in recent years he has expanded it by opening scores of chain stores across the country.

汤普森的生意起初规模不大，但近年来他在全国各地开了几十家连锁店，把生意做大了。

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Wayne Bronner says demand for small objects to hang on Christmas trees has expanded over the years.

VOA: special.2009.12.25

Semiotics has expanded into every imaginable aspect of thought.

符号学涉及几乎任何学科。

耶鲁公开课 - 文学理论导论课程节选

The gas has expanded.

气体膨胀了。

麻省理工公开课 - 热力学与动力学课程节选

Also, the recession ended a few months later and GDP has expanded ever since.

FORBES: Consumer Confidence and Funny Feelings

Irwin's capsule collection has expanded to include ikat, geometric, floral, animal and children's patterns.

WSJ: Luke Irwin: The Country Weaver

Yet the oil supply, at 84 million barrels a day, has expanded just 1% since 2004.

FORBES: Oil Gleaners