Almost every hour is scheduled, with crew members' tasks and the tools they will need choreographed by logistics experts on the ground making sure no one gets in anyone's way.

几乎每个小时都有地面上的后勤专家精心安排了宇航员的任务以及他们所需要的工具，确保没有人会相互干扰。

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Another common mistake is people's knees extend past their toes, placing stress on the knee, or their heels lift off the ground making them unbalanced.

另一个常见的错误即是膝盖超过脚趾，使膝盖受压、脚后跟离地，导致失去平衡。

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During thunderstorms in parts of the western United States, rain often evaporates before hitting the ground, making the region vulnerable to brush fires from lightning hitting the dry earth.

在美国西部的一些地方，当暴雨来临时，雨水常常还没接触到地面就蒸发殆尽，当闪电击中干燥的地面时，这些地区经常发生由此而引发的灌木起火。

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Locals said the land, which is bordered by two brooks, absorbs some flood water but the farm will compact the ground making it more prone to water damage.

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And when the unexpected has happened -- like the Gulf oil spill or Hurricane Sandy -- he has been on the ground making sure that people get help right away and we deal with these challenges as professionally as possible.

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Mr Assad's exiled opponents may be scrappy, but those on the ground are making progress.

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