根据提示翻译句子
难道这些狮子不是来自非洲的吗？（be from）
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Our hometown has left so many soft and sweet memories in our hearts.
We don't know each other at all，but the bright smiles bring us closer.
"三孩政策"有助于减轻人口老龄化的压力。
The three﹣child policy contributes to easing the from the aging .
只有博览群书，我们才能增长知识、开阔眼界。
Only by can we gain more knowledge and broaden our horizons.
政府应采取严格措施执行垃圾分类政策。
The government should take strict measures to garbage sorting policy.