minimum allowable radius

例句：

1. 1. The design of the new building has a minimum allowable radius of 20 meters.
   新建筑的设计有一个最小允许半径为20米。
2. 2.The company's policy on environmental protection requires a maximum allowable radius of 50 kilometers from the factory.
   公司对环境保护的政策要求工厂周围最多允许有50公里的半径。
3. 3. The spacecraft's trajectory must be within the minimum allowable radius for safe landing.
   宇宙飞船的轨迹必须在安全着陆的最小允许半径内。