They are also very tough to monitor, so population estimates are wobbly.

由于这种鱼很难监测到，所以对它们数量的估计也不稳定。

youdao

There are estimates that more than eighty percent of the population cannot read or write.

据估计超过80%的人口不能读或写。

youdao

There are estimates that more than eighty percent of the population cannot read or write.

据估计超过80%的人口不能读或写。

youdao