Sentence examples for estimates are difficult from inspiring English sources
Because some Muslims are new immigrants and others are recent converts, reliable estimates are difficult.
Because they are solitary and hard to spot, population estimates are difficult, though the foundation believes there are fewer than 30,000 in the country.
Several art experts and dealers said that a major Deas work would easily go for millions of dollars at auction — though estimates are difficult because it has happened so rarely.
While those estimates are difficult to verify, the nation's economy since April has added an average of only about 40,000 jobs a month, raising concerns about a double-dip recession.
Franklin Thomas, chairman of the Sept. 11 Fund, said that although estimates are difficult, his instinct told him that no more than 25percentt of the fund's remaining $251.4 million would be paid out as cash grants to individual families and victims.
Spending by outside groups could reach to more than $970 million for the 2012 cycle, although precise estimates are difficult because the rate of spending by outside groups has been rising so quickly since Labor Day But even that increase could substantially understate the total.
A report released this week by the General Accounting Office, an investigative branch of Congress, said such estimates were difficult to confirm.
The validation of fire emission estimates is difficult, since the emissions from fire to fire are highly variable, and direct flux measurements from fires are extremely difficult.
However, methodologies for the estimation of tree root biomass are varied and their effectiveness in terms of the precision of biomass and carbon estimates is difficult to evaluate.
In this regard, obtaining precise energy estimates was difficult because the simulated structures have large stochastic variations and some mutants did not reach an equilibrium by the end of the simulation.
