这就是为什么我们要搭建新的机会的阶梯，让所有愿意攀登的人步入中产阶层的行列。
And that's why we need to build new ladders of opportunity into the middle class for all who are willing to climb them.
这就是为什么你应该不要让您的鸟攀登以上您的肘部。
This is why you should never allow your bird to climb above your elbow.
这就是现代登山运动中最不可思议的攀登之一。
It was one of the most incredible climbs of modern mountaineering.
这就是现代登山运动中最不可思议的攀登之一。
It was one of the most incredible climbs of modern mountaineering.
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