It is estimated the project will last four years.
據估計，這項工程將持續四年。
She found it extremely difficult to get a job.
她發覺找工作極其困難。
We estimated it would cost about 5 000.
我們估計要花費大約5000歐元。
It's almost time to go.
是差不多該走的時候了。
There is some doubt about the best way to do it.
這件事怎么做才是最佳辦法有點吃不準。