The phrase 'serious explanations' is correct and usable in written English.
You can use this phrase to emphasize that a certain explanation is fact, logical, and important. For example: "I need some serious explanations from you about why the project is behind schedule."
His deadly serious explanation of the coal oven makes a dandy aria.
A month later officials insisted they did not "know of any serious explanation for the phenomena".
A pretty little thing was heard finishing a long and serious explanation, "And that's why I think Papa is going to shoot him".
A pretty little thing was heard finishing a long and serious explanation, "And that's why I think Papa is going to….
A more serious explanation of the current malaise lies in the rise of the environmental movement and the pervasive influence within it of a dogmatism based on the belief that modern technology adversely affects our relationship with nature.
In an extraordinary question-and-answer session at the left-wing newspaper Libération (basically home turf for the candidate), Hollande was caught skirting anything like a serious explanation of how he would achieve growth.
But the tradition that Dylan is steeped in is inarguably deep, and his fascinating, rambling, and yet completely serious explanation of how the tradition worked on him — how "John Henry" became "Blowin' in the Wind"; how "Deep Ellum Blues" became "Just Like Tom Thumb's Blues" — is among the best of his recent performances.
There is no discussion, lamented the author, of "social and cultural domination, violence, relegation, exploitation, alienation at work, class, struggle etc .A more serious explanation could be that Mr Piketty was too closely linked to a proposal by François Hollande, France's Socialist president, during his 2012 election campaign to introduce a now-discredited 75% top income-tax rate.
