It is estimated the project will last four years.
据估计，这项工程将持续四年。
She found it extremely difficult to get a job.
她发觉找工作极其困难。
We estimated it would cost about 5 000.
我们估计要花费大约5000欧元。
It's almost time to go.
是差不多该走的时候了。
There is some doubt about the best way to do it.
这件事怎么做才是最佳办法有点吃不准。