The policy limiting families to one child began more than 30 years ago.

三十多年前，中国开始实施独生子女政策。

That year, the Corps announced it would end a policy limiting dredging in shipping areas during nesting season for sea turtles.

2021年，美国海军陆战队宣布，在海龟筑巢季节，将结束航运地区疏浚的限制政策。

Instead, this is because there are less stringent government policies limiting prices of brand-name drugs in the US than there are in other affluent nations.

相反，这是因为与其它富裕国家相比，美国政府对名牌药品价格的限制没有那么严格。