定义裂纹深度扩展速率发生转折时对应的疲劳荷载的次数为鱼鳞伤萌生寿命。
The times of fatigue loads at turn over point is defined as the initial life of corner fine .
假如我们选择OODB方案，我们必须扩展我们的深度，因此这会产生强迫的培训和对工程团队的时间进度产生不确定性。
If we chose an OODB solution, we'd be a bit out of our depth, so it would force training and uncertainty into the engineering team's schedule.
但是，“阿尔文”号预计在第二阶段才扩展最大深度，乐观估计是在2015年完成。
But the Alvin won't increase its maximum depth until the second stage, optimistically scheduled for 2015.
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