她看到狮子在玩耍，袋鼠在跳跃。

She saw lions playing and kangaroos jumping.

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让我们用物理学家的眼光来看看这跳跃的袋鼠、俯冲直下的蝙蝠、跃起的海豚、高耸如云的加州红木。

Look, through the eyes of a physicist, at a bounding kangaroo, a swooping bat, a leaping dolphin, a soaring Coast Redwood.

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尽管其房地产泡沫的紧缩以及严重的干旱，但是袋鼠经济仍保持着跳跃似的增长。

Despite the deflation of its housing bubble and a severe drought, the kangaroo economy keeps bouncing along.

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