research and development
noun [ U ] uk/rɪˌsɜːtʃ ən dɪˈvel.əp.mənt/ us/ˌriː.sɝːtʃ ən dɪˈvel.əp.mənt/ (abbreviation R and D)
研究与开发
the part of a business that tries to find ways to improve existing products, and to develop new ones
All our profits are re-invested in research and development. 我们的利润全部被再投入到研发上。