From Putin's point of view, he has a major challenge with terrorism.
The other major challenge with electric vehicles is the cost of the battery packs.
The major challenge with such dynamic models is to guarantee liveness and boundedness.
Aid workers said both were a major challenge, with supplies and relief workers overstretched.
However, operation under high load and low load conditions is a major challenge with RCCI combustion.
Finding a cell source is a major challenge with the autologous source remaining the ideal one.
Considering we have a major challenge with climate change, the nuclear issue is interpreted in a less harmful way.
A major challenge with sustainable procurement is that palm oil from different sources tends to get mixed together, making it difficult to trace back to the plantation.
The major challenge with such non-rocking-chair batteries is that they lag behind Li-ion batteries in theoretical cell-level energy density.
A major challenge with these databases is to extract meaning from the important data they contain: to discover structure, find patterns, and derive causal relationships.
I think a major challenge with DOE is management, and I think DOE's engagement with the business community would benefit from a business leader taking the helm.
