populations dropped翻译

populations dropped的基本解释

读音: 美: 英:

人口下降：指某个地区或国家的人口数量减少。

例句

Instead, the global growth rate dropped from 2 percentin the mid-1960s to roughly half that today, with many countries no longerproducing enough babies to avoid falling populations.相反，全球人口增长率从六十年代中期的2%下降到了如今的1%，很多国家的新生儿数量已经无法阻止人口总量减少。
Recent research data show that the transmission of lymphatic filariasis in at-risk populations has dropped by 43% since the beginning of the GPELF.最近的研究数据表明，自实行消除淋巴丝虫病全球计划以来，高危人群的淋巴丝虫病传播已下降了43%。
As we have previously reported, Amur tiger populations have dropped precipitously in recent years to around 250 animals, and the species faces a genetic bottleneck that puts it at risk of inbreeding.我们之前的报道指出，它们的数量在最近几年锐减到250只左右，这个种族面临着遗传瓶颈，这将它们推入了近亲繁殖的危险境地。
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