求翻译：9．There are many reasons for the government’s hard-line defence of its one-child policy. One is a perhaps understandable view that China is unique, and that other countries’ experience is irrelevant. A second is that, though the policy may not have done much to push fertility down at first, it might be keeping it low now. A third is that, if controls were lifted, population growth might rise. In fact, there is little justification for such fears: in practice, the one-child policy varies from place to place; it hardly applies to China’s minorities and is more lightly applied in rural areas是什么意思？

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