根据此项排名，哥斯达黎加是全球绿化率和幸福指数最高的国家，多米尼加共和国和牙买加分列其后。 该调查由智囊机构新经济基金会发起。

Costa Rica is the greenest and happiest country on the planet, according to the rankings developed by think tank the New Economics Foundation, followed by the Dominican Republic and Jamaica.

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雪上加霜的是，央行宣布消费者信心指数已低于平均水平。

To make matters worse, the bank said, consumer confidence in the country has fallen to "below-average levels".

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按每年新产品导入数的变化状况，分均匀分布、线性增长、指数增长三种情况进行模拟迭加研究。

According to the varying situation of the quantity of introduced products, we research it by uniform distribution, linear growth and exponential growth.

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