Sentence examples for the major problems is from inspiring English sources
"One of the major problems is funding.
One of the major problems is compatibility.
One of the major problems is the long lead time of books compared to other media.
One of the major problems is consumption for cooling and heating.
One of the major problems is the heavily increased muscle fatigue due to unphysiological stimulation.
One of the major problems is that too many people are taking an apprenticeship at intermediate level – equivalent to GCSEs – according to Allen.
Failure to communicate is one of the major problems -- be mature!
Among the major problems was that senior officials were often perceived as receiving lenient treatment for wrongdoing.
The major problems are due to time constraint and the difficulties in maintaining primary cell culture.
The major problems were hog cholera, bovine pleuropneumonia, Texas cattle fever, turkey blackhead, and bovine tuberculosis.
The major problems are the societal and commercial pressure to stop breastfeeding, including aggressive marketing and promotion by formula producers.
