Translation of "Estimated" in Chinese

The population of the country is roughly estimated at 50,000,000.

這個國家的人口粗略估計是五千萬左右。

The value of the painting was estimated at several million dollars.

这幅画被估价数百万元。

Last time I counted, I estimated that I know around 2500 Chinese characters.

我上次计算，估计我已经学会了两千五百个汉字左右。

It is estimated that only a few hundred pandas remain, with a small number of them being raised in zoos in China and abroad.

据估计只有几百只遗留的熊猫，其中的少数圈养在中国和国外的动物园。