名词
中文翻译：退行
同义词：
['retrogression', 'regression', 'retrograde', 'retrogradation']
例句：
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1.The team's performance has been on a steep decline since the beginning of the season.
自从赛季开始以来，该队的表现在急剧下降。
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2. During the experiment, the data showed a clear trend of regression.
在实验中，数据显示出明显的回归趋势。
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3. The researcher found that the population was gradually regressing back to its original state.
研究者发现人口正在逐渐回归到其原始状态。