单词rappel
n.: 坐式下降法
v.: 绕绳下降（用绳缠绕着身体，双脚蹬陡坡或峭壁自己放绳下滑）
网络: 用绳索下降；绳索下口；用绳索下口
绕绳下降（用绳缠绕着身体，双脚蹬陡坡或峭壁自己放绳下滑）:
to go down a steep cliff or rock while attached to a rope, pushing against the slope or rock with your feet
用绳绕双腿下降
用绳索下囗
坐式下降法〔指登山者用双绳一端系于山上,一端系在自己身上。从悬岩陡壁滑下〕
第三人称单数：rappels
现在分词：rappelling
过去式：rappelled
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。
Every one can rappel down calmly the side of 40-meter cliff with a rope and a Flemish knot. I have also been a spider man.
一根绳子，一个八字扣，每个人都可以从40米高的陡壁下从容而下。我也做了一次蜘蛛人。
So now I don"t want to rappel down on the back side of this slip knot, that would be dangerous.
好现在我不要在这个可以拽开的结的这一段下降，太危险了。
Witnesses noted that the climber set up intending to be lowered, while her belayer thought she was going to rappel.
目击者声称攀爬者做顶时意在被保护员降下至地面，而她的保护员则认为她要使用保护器自行下降。
It is a truly fantastic rappel, it takes almost 8 seconds for a rock to hit the bottom.
利用绳索，需要将近8秒时间到达底部，是一个非常奇妙的旅程。
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。
If the chip detects any impending leaks, shock troops rappel from previously unseen choppers and haul the staffer away.
如果芯片检测到任何即将漏水，突击部队绳索从以前看不到的菜刀和长途以外的工作人员。
A new study reveals that dragline silk, the stuff spiders use to rappel, has a molecular structure that makes it resilient to twisting.
一项新的研究发现：蜘蛛用来坐式下降的牵引丝有着一种分子结构，使得蛛丝有弹性，避免扭曲。
Grade II A 1 - or 2 - pitch climb within easy reach of a vehicle, little objective danger, and easy descent by rappel or down climbing.
一到两个绳距，在交通容易到达的地方，有点小危险，下攀或垂降容易。
So now if he is 10 meters , I can rappel down to him.
好现在，如果他是在我下面十米，我可以下降下去。