However, to achieve the same kind of interaction with sound waves has been a more challenging undertaking. (sciencedaily.com)
The management of highly allergic pets can be a very challenging undertaking, but the results obtained dramatically improve the quality of life for both you and your cat. (texaswestveterinarian.com)
One of the most important and challenging undertakings of parenting is to build strong, close bonds between children and their parents. (attachmentparenting.org)