但这个问题的规模和复杂程度远大于瑞典以及其他斯堪的纳维亚半岛国家二十年前面对的挑战，雷哈特女士说。
But the scale of the problem, Ms. Reinhart says, is larger and more complex than the challenges faced by Sweden and other Scandinavian nations nearly two decades ago.
目前真正的问题在于美国人民是否能够现实地对待他们所面对的能源和环境挑战。
The real question going forward is whether Americans can be realistic about the energy and environmental challenges facing them.
我试着强调一些最困难的，挑战问题和决定，你们每个人，在选择这条职业道路后都必须面对。
I try to highlight some of the most difficult and challenging issues, decisions that each of you will face if you choose this career path.
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