名词短语
中文翻译：生育率趋势同义词
同义词：
['生育率趋势，生育率趋势，生育率趋势']
例句：
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1. The fertility rate has been declining for several years, affecting the population growth.
生育率已经下降了几年，影响了人口增长。
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2. The government is concerned about the fertility trend and plans to introduce policies to promote childbirth.
政府对生育率趋势感到担忧，并计划推出政策以促进生育。
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3. The fertility trend is closely related to the economic environment, as a high fertility ratecan lead to an overpopulation problem.
生育率趋势与经济环境密切相关，因为高生育率可能导致人口过剩问题。