Some of these things are 10 stories deep or more, and one of my climbing friends says that the reason we actually climb at night is because if we ever saw the bottom of what we're climbing over, we would never do it.
有些裂缝有十层楼那么深，甚至更深。 跟我同行的攀爬者说 我们之所以选择在夜晚攀爬 是因为如果我们可以清楚看见 我们所攀爬的裂缝的底部的话， 我们是打死也不会爬过去的。