米查姆承认，如果不是为了那些承受过的艰辛，他恐怕不会参加奥运会。
Mitcham thinks he would not be going to the Olympics if not for the hardship he endured.
位于1518米高的天门山上的这段峭壁因沿着山体向外伸展而攀爬难度极大。为防止从山崖上掉下，攀岩者须付出更多的艰辛。
The cliff of the 1,518-meter-high mountain is more challenging than buildings since its angles can be more than vertical and climbers would have to use more energy to prevent falling.
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