But Kroehnert says that in the case of declining birth rates, it will be difficult to make up for them simply by adjusting policy.

但是Kroehnert说，按现在这种递减的出生率走下去，仅仅靠改变政策很难解决问题。

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Even with declining pregnancy rates, the United States still has one of the highest overall birth rates among industrialized countries.

尽管国内怀孕率持续走低，美国依旧是发达国家中出生率最高的国家之一。

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Some think birth rates are already declining.

有人认为，出生率已经在下降。

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Some think birth rates are already declining.

有人认为，出生率已经在下降。

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