二十一世纪初期（本文指２０００年至２０３０年这段时期）,世界农业主导技术群将发生一些新变化。研究这种变化 ,对于预测农业科技发展的根本方向 ,制订正确的农业科技政策 ,开展新的农业科技革命 ,明确农业科技的投入重点和方向等等 ,都具有重要的意义。１．决定２１世纪初期 In the early twenty-first century (this article refers to the period from 2000 to 2030), there will be some new changes in the world's leading agricultural technology group. Studying this change is of great significance for predicting the fundamental direction of agricultural science and technology development, formulating the correct agricultural science and technology policy, launching a new revolution in agricultural science and technology, and specifying the focus and direction of agricultural science and technology investment. 1. Decide the early 21st century