Sentence examples for major challenges were from inspiring English sources

A few new dye types were introduced in the 20th century, and major challenges were posed by the introduction of synthetic fibres, which held a major share of the world market, and by technological advances.

Two major challenges were encountered.

Once the major challenges were identified, it was decided to identify two research issues related to each of them, which would allow facing changes and risks in 2030.

In terms of the challenges for the teachers, three major challenges were mentioned: a) the influences of habits and traditional teaching methods, b) the need for deep understanding of scientific content knowledge, and c) the difficulty of teaching and learning argumentations for Vietnamese primary teachers and students.

In the modelling process, two cameras (top view and side view) were employed synchronously to identify the 3D coordinate of each fish (x-y and z, respectively), and the major challenges were the distortion caused by the perspective effect and the refraction at water boundaries.

Besides the usual methodology issues described in the next section, two major challenges were encountered.

Major challenges are discussed.

One of the major challenges is occlusion.

Some major challenges are stated below.

However, two major challenges are raised for the classical CCA.

For each topic, major challenges are identified and proposed solutions are reviewed.