有几个因素已被援引来说明出生率降低的原因。
Several factors have been adduced to explain the fall in the birth rate.
《牛津词典》
其它一些社会变化也在降低出生率。
Other social changes are also depressing the country's birthrate.
youdao
中国应该坚持降低出生率，他说到。
China would maintain a low birth rate, he said.
要求他们尽力降低出生率。
They are asked to strive for lower birth rate.
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