我们正迅速靠近利比亚海岸线，沃尔特第三次问我能否在预定时间到达指定速度和高度。
With the Libyan coast fast approaching now, Walt asks me for the third time, if I think the jet will get to the speed and altitude we want in time.
建筑设计师们设想先在地基上建造天桥，然后再用机械将其吊到预定高度。
Designers envision building the skybridges at the saddle and then using a jacking mechanism to hoist them into place.
但是，由于其专用特性，整个软件栈(包括操作系统)都是高度定制的，或者说，它的规模是针对预定用途适当设置的。
However, due to its purpose-built nature, the entire software stack (including the operating system) is highly customized or "right-sized" for its intended use.
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