名词
中文翻译：时间率变化同义词
同义词：
['time-rate change', 'time-rate variation', 'temporal rate of change']
例句：
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1. The company's revenue has been increasing at a time rate of about 5% per year.
该公司的收入以每年约5%的速度增长。
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2. The temperature has changed by approximately 3 degrees Celsius during the last hour.
过去一小时，气温大约下降了3摄氏度。
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3. The study found that the rate of change in population growth was not consistent across different regions.
研究发现，不同地区的人口增长率不一致。