就在几周前，飞机工程师才发现他们并没有完全了解金属疲劳——四月一日，西北航空公司812航班使用的波音737-300型客机在从凤凰城飞往萨克拉门托的途中发现在机身的上半部有一个五英尺的裂纹，不得不紧急迫降。
Over the past few weeks, aircraft engineers have found they do not know quite as much about metal fatigue as they thought.
上半年留给马拉多纳的主要问题——确定一种风格、挑选合适的球员、稳定阵型变化和培养球员的精神，这一切他都已经完成了。
The test of Maradona's work comes this year - choosing a philosophy of play, selecting his players, establishing variations and fostering team spirit. He appears to have done all that.
战神一号X型的上半部分是个模拟仓，上层安装着根据合适形状和重量制造的船员舱和紧急逃生机制的模拟器。
The top half of the 1-x is a dummy. What would be an upper-stage, with a crew capsule and its emergency escape mechanism are simulators made to the correct shape and weight.
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