哈特雷2号彗星是一颗被称之为“木星家族”的彗星，原因在于其轨道与木星和其它气态星体的轨道靠得很近。
Hartley 2 is a so-called Jupiter family comet, because its orbit takes the comet close to the orbits of Jupiter and the other gas giants.
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.
令人更加欢欣鼓舞的是，雷哈特夫妇发现一旦经济从危机中复苏之后，如果没有新的震荡，大都不会再陷入衰退。
More cheerfully, the Reinharts find that once economies start to grow after a crisis they tend not to slide back into recession without suffering some new shock.
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