The project has an estimatedlife span of only 50 to 100 years, a blink of the eye in this region.
这项工程估计寿命仅仅50到100年之间，对于这个地区来说只是眨眼之间。
2
The estimatedlife of a steel bridge subjected to random load in highly dependent upon damage accumulation caused by fatigue load.
对于承受随机载荷的钢桥，其寿命依赖于这种疲劳载荷造成的累积损伤。
3
Then the average annual net profit is calculated by dividing the difference between incremental revenues and costs by the estimatedlife of the investment.