The curriculum includes a lesson from the firemen on how to rappel from a building.
其中的课程包括消防员教授如何用绳索从大楼上下来。
Canyoneers say even a relatively easy rappel like this one can feel like drowning in midair.
溪降探险者们说，即使像这样一个相对简单的绳降，也能让人产生在半空中溺水的感觉。
They learned to rappel down a cliff.
他们学会了绕绳从绝壁上滑下。
Once at the rappel station, connect directly to one of the anchors.
一旦到达下降站，直接将自己连接到锚点上。
The rescuers had to rappel from the roof down the side of the building to save the two men left hanging by their safety harness es.
救援人员不得不从屋顶用绳索从建筑的一侧下降，以营救这两名被他们的安全挽具吊着的工人。
The rescuers had to rappel from the roof down the side of the building to save the two men left hanging by their safety harness es.
救援人员不得不从屋顶用绳索从建筑的一侧下降，以营救这两名被他们的安全挽具吊着的工人。
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