名词
中文翻译：Unknown
同义词：
['improved land', 'improved soil', 'improved terrain']
例句：
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1. The engineers have improved the construction site to make it safer for workers.
工程师们已经改进了施工场地，使其对工人更安全。
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2.The farmers have improved the quality of their crops by using more fertilizers.
农民们通过使用更多的肥料来提高作物的质量。
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3.The city has improved its infrastructure to improve transportation and reduce congestion.
该城市已改进其基础设施，以改善交通并减少拥堵。