Liberty even left her nest for a long period of time, leaving her eggs unviable.

" 自由" 甚至会离开她巢穴很长一段时间，那样她蛋无法独立生。

That's the point where it becomes economically unviable, and an increased risk to life to maintain the defenses within Fairborn.

" 如果真发生洪水，当地会失去经济生能力，同时对村民来说，也会增加他们抵御洪水时。

Once these have been applied, it becomes economically unviable to take corrective action, making any further collected data historical and useful only to inform future practices for the season to come.

一旦应用了这些， 采取纠正措施在经济上就变得不可行，使任何进一步收集数据成为历史， 并且仅对下一季未来实践有用。