动词短语
中文翻译：向下生长
同义词：
['grow downwards', 'grow downward']
例句：
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1.The plant grows down from the roots to the surface of the soil.
这种植物从根部生长到土壤表面。
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2. The city is growing down into a metropolis.
这个城市正在向都市发展。
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3. The economy is growing down as more people start businesses.
随着越来越多的人开始创业，经济正在增长。