Once you have learnt how to write so then you will be able to face every sort of challenges in the field of writing an essay. (trcb.com)
People in his lab work to solve major challenges in the field of nerve cell development rather than ticking off projects listed in a grant proposal. (sciencemag.org)
In fact, one of the things I find most compelling about education is that the most pressing challenges in this field demand collective action and coordination. (gse.harvard.edu)