The phrase "ambitious and rigorous" is correct and usable in written English.
You can use it to describe a project, plan, or approach that is both challenging and thorough in its execution.
Example: "The ambitious and rigorous research project aims to address climate change through innovative solutions."
Alternatives: "aspirational and thorough" or "driven and meticulous".
Long began a hitting tutorial that was the most ambitious and rigorous in-season work he had done with a player in his four seasons with the team.
And what I would say is this: a President who regards some of the most ambitious and rigorous media outlets as "enemies of the American people" is speaking an ominous language the language of the authoritarian.
A politician without a Ph.D., Mr. Kerrey, 65, was recruited largely for his star power, and given a mandate to unite the New School's eight disparate divisions and turn a campus long viewed as a kind of academic shopping mall for continuing education into a more ambitious and rigorous one with a greater undergraduate focus.
The future of the live performing arts over the next decade will therefore come through audaciously and courageously positioned projects, which are the result of a very ambitious and rigorous artistic and business process.
We have suggested in this paper that there is room for a more ambitious, integrated, and rigorous approach to developing mH systems for global mental healthcare.
Gove said his plans would make exams "more challenging, more ambitious and more rigorous".
From his earliest appearances, his recital programs — novel, ambitious and technically rigorous — consisted almost entirely of contemporary works.
Gove's new reforms will see less emphasis on coursework, a different grading system doing away with the old A*-G and replacing it with numbers and exams that will be: "more challenging, more ambitious and more rigorous".
He told the Commons that the changes would make exams "more challenging, more ambitious and more rigorous", ensuring GCSEs were universal qualifications with more detailed subject content.
That agreement must be scientifically rigorous, equitable, ambitious and exact.
While such limitations are probably inevitable in nascent areas of research funded by short-term academic grants, there is a need nonetheless not just for more ambitious and integrated mH systems, but also for more extensive, long-term, and rigorous attempts to evaluate the effectiveness and acceptability of such systems in the mental health context (as with mHealth more generally [ 32]).
