When we monitor wildlife, increasing the accuracy and the precision of animal surveys gives us more confidence in our population estimates.

“当我们监测野生动物时，提高动物调查的准确性和精确度，可以使我们对我们的种群估计更有信心。

In the late 17th century, what had become the city of New York had an estimated population of less than 8,000 people.

17世纪末，纽约市的人口大约不到8 000人。

And despite the fact that population estimates vary, we think that a quarter of the world's wild tiger population might be living here in the Sundarbans.

尽管数量估计有所不同，但是我们认为全世界四分之一的老虎种群可能就生活在松达班。

But based on current population estimates, four percent of the world is roughly 300 million people that will potentially have social anxiety disorder at some point in their lifetime.

但是基于现有人口估计，世界人口的 4%，大约为 3 亿人，都可能在人生的某个节点患上社交焦虑症。

The North American Amphibian Monitoring Program is the country's largest frog-counting system. Volunteers listen for frogs, identify the species, and give population estimates. They've been doing this for over a decade.

北美两栖类监测计划是美国最大的青蛙计数系统。志愿者们倾听蛙鸣，鉴定其品种，并作出数量估算。十多年来，他们都是这么做的。