同一时期，日本工业产值下降了21%，德国下降了15%。
Over the same period Japan's fell by 21% and Germany's by 15%.
随着营养以及卫生保健的提高，青春期年龄也就随之下降。
As nutrition and health care improved, the age of puberty dropped.
同一时期的其他国家在生育率方面也有着相似的下降现象。
Other countries achieved similar declines in fertility during the same period.
经济增长放缓，从2000年中期的平均7%下降到去年的4.4%。
Economic growth has slowed, from an annual average of 7% in the mid-2000s to 4.4% last year.
在鸟的繁殖期快要结束的时候，雌鸟离婚的比率就下降了。
Towards the end of the plover breeding season, the rate of female divorce declines.
在千鸟的繁殖期快要结束的时候，雌鸟离婚的比率就下降了。
Towards the end of the plover breeding season, the rate of female divorce declines.
但是到了2006年中期，房地产市场出现了狂热，这个比率下降到了60%。
But by mid-2006, with the craze in full swing, the figure fell below 60%.
自一月份高峰期后，股票指数下降10%。
自一月份高峰期后，股票指数下降10%。
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