Sentence examples for two serious challenges from inspiring English sources

The fact that the economy is facing two serious challenges simultaneously is what makes the outlook so uncertain.

In the long run, though, Israel faces two serious challenges that I'd dub the Stephen Hawking Story and the Joseph Story.

Although these polls raise hopes for a much-needed change in European politics, all these left parties face at least two serious challenges in order to retain mass support.

Now, there are two serious challenges ahead for the startup.

The nonlinear nature of a quadrotor, on the one hand, and the difficulty of obtaining an exact model for it, on the other hand, constitute two serious challenges in designing a controller for this UAV.

These changes, however, even if fully acknowledged and aggressively executed, will leave three serious challenges unaddressed.

According to Lewis, Humean supervenience faces only one serious challenge: objective chance, or propensity, a notion that Lewis thought was indispensable to science.

In the last week, you published two articles about serious challenges to the health of our country and its economy ("Citrus Disease With No Cure Is Ravaging Florida Groves," front page, May 10; and "The Next Pandemic: Not if, but When," Op-Ed, May 10).

Now one very serious challenge to the tenseless theorist is to explain why, if time does not pass in reality, it appears to do so.

All three tasks present serious challenges, and remain important areas of research and investigation.

We suggest that inclusion of Aboriginal knowledge and practice as a fundamental component of the Program is key to its survival over more than twenty years despite serious challenges.