Sentence examples for which has challenged from inspiring English sources

Turbulent heat transfer is an extremely complex phenomenon, which has challenged turbulence modellers over various decades.

Google's behaviour stands in stark contrast to Twitter, which has challenged similar US government demands.

The agency signaled that it was reconsidering how the regulations affect the insurance industry, which has challenged them in court.

Barnes & Noble, which has challenged Amazon.com's claim that it is the earth's biggest bookstore -- countered with its own news release.

The housing group is represented by the National Student Legal Defense Network, which has challenged a series of DeVos moves.

Officials with the Republican National Committee, which has challenged the law's constitutionality, are debating what action to take.

HCV has a high mutation rate and multiple genotypes, which have challenged the development of an HCV vaccine.

On the losing side is Verizon Wireless, which had challenged the agency's data roaming order in 2011.

A spokesman for the Department of Homeland Security, which had challenged the asylum claims, said its lawyers were considering an appeal.

The recommendation was a setback for FedEx and U.P.S., which had challenged the ownership and control structure of DHL Airways.

Improvements in American programming have been driven by newcomers like HBO, which have challenged the existing networks with creative, edgy fare.