Sentence examples for remained a great challenge from inspiring English sources

But during many years, the computation of precise solutions in unbounded scenarios remained a great challenge.

Harnessing the immune system for effective cancer therapy has remained a great challenge.

Although progresses have been made in the synthesis of one-dimensional ZnO, a simple and fast approach had remained a great challenge.

Therefore, exploiting price-moderate and resource-rich catalysts for ORR to substitute for Pt-based catalysts has remained a great challenge.

Numerical analysis of complex engineering and biological problems has always remained a great challenge (Riaz et al. (2016; Farooq and Hussain 2016).

Prediction of Indian Summer Monsoon Rainfall (ISMR) is of vital importance for Indian economy, and it has been remained a great challenge for hydro-meteorologists due to inherent complexities in the climatic systems.

Nonetheless, food safety problems continue to persist across the globe and remain a great challenge (Ntuli et al., 2017).

For effectively treating tumor related-bone defects, design and fabrication of multifunctional biomaterials still remain a great challenge.

However, the wide applications of fuel cells remain a great challenge because of the slower rate of the cathodic oxygen reduction reaction (ORR) [4, 5].

Despite the fact that numerous advanced technologies enable the molecular design of new antibiotics, the MDR-associated infections remain a great challenge to modern medicine.

Nowadays, rational design and simple synthesis of multifunctional non-noble electrocatalysts with high activity and low cost remain a great challenge.