What exactly do the top 20 key scientific and technological fields in the world mean?

20 cutting-edge scientific and technological hotspots in 7 major fields, namely:

Information technology field: quantum information processing, third generation semiconductor, augmented analysis, artificial intelligence chip, 6G network, strategic computing, mixed reality.

Life and health fields: clinical application of gene editing, AI-assisted research and development of new drugs, brain-computer fusion, artificial meat.

Material field: magic horn graphene.

Energy field: hydrogen energy technology, perovskite solar photovoltaic cells.

Space and transportation: space intelligence and unmanned driving.

Climate, ecology and environment: negative emission technology.

Advanced manufacturing and other fields: extreme operation robot, nano-robot, weaving material manufacturing.