Sentence examples for remains challenge from inspiring English sources

However, it remains challenge to selective synthesize 1D iron oxides nanostructures with controllable morphology.

However the production of nanostructured materials with environmental benignity remains challenge for researchers.

Despite the success of demonstrating preclincal efficacy, further utilization of DCU as a tool to evaluate target PK/PD relationships in chronic animal models [24] remains challenge.

However, it still remains challenge for SECM to fabricate arbitrary three-dimensional (3D) microstructures because of the limitation of positioning system.

However, limited absorption by the intestinal epithelium remains challenge to their clinical application, and little is known about how these NPs within the cells are transported.

The About Group also remains challenged.

However, life there remains challenging.

Almost four decades on, Long's art remains challenging.

Finding quality opponents besides each other remains challenging.

Though, he noted "the advertising market remains challenging".

The treatment of such complications remains challenging.