The display was put together by the World Wildlife Fund and the population estimate is based on their most recent survey.

这次展览由世界野生动物基金会举办，对熊猫数量的估计来自于他们最近的调查。

youdao

Then comparing the number of marked bears to the number of bears that are not marked, we can come up with a population estimate.

然后比较有标志的熊的数量与没有标志的熊的数量，我们可以得出一个群体数量的估计。

youdao

The fourth Waterbird Population Estimate found that 44 percent of the 900 species globally have fallen in the past five years, while 34 percent were stable, and 17 percent rising.

在这份第四次＂水鸟数目估计＂调查报告中发现，在过去的五年内，在全球900种鸟类中有44% 数目在下降， 34%保持稳定， 17%在增长。

youdao

The fourth Waterbird Population Estimate found that 44 percent of the 900 species globally have fallen in the past five years, while 34 percent were stable, and 17 percent rising.

在这份第四次＂水鸟数目估计＂调查报告中发现，在过去的五年内，在全球900种鸟类中有44% 数目在下降， 34%保持稳定， 17%在增长。

youdao