动词
中文翻译：降低
同义词：
['decrease', 'diminish', 'fall']
例句：
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1. The temperature has dropped significantly since yesterday.
自昨天以来，温度已经显著下降。
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2. The population is declining due to the aging population.
由于人口老龄化，人口正在下降。
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3. The economy is expected to decline in the coming years.
预计未来几年经济将下降。