Halley's comet is extremely bright and has two tails. Its latest return was in 1986.

璀璨明亮的哈雷彗星有两条彗尾，最近一次回归是在1986年。

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The return of RMB exchange rate has a characteristic of fluctuation clustering, does not comply with the normal distribution and has an obvious peak and fat tails.

人民币汇率收益率波动有集群性效应，不符合正态分布，有尖峰厚尾的特点。

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Lobstermen also notch the tails of egg-bearing females, and return them to sea to join the protected brood stock.

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