The archaeologist estimated that the vase was 3,500 years old.

考古学者推断那只花瓶大约有三千五百年之久。

The dealer estimated the worth of the used car at $850.

汽车商估计这辆二手车值850元。

The cost of building is estimated at 10,000dollars.

建筑费估价为一万元。

I estimated the room to be 15 feet long. = I estimated that the room was 15 feet long.

据我估计，这房间有15尺长。

an estimate of the cost of a house

房屋的成本估计。