Several commodity prices appear to have peaked earlier this year and crude oil prices have even fallen by more than 10 dollars per barrel from their recent... K Matthies,S Economist,DOI Macroeconomics,... - 《Intereconomics》 被引量: 3发表: 2005年 Western US power prices tumble after record...
Some statistics may make sense. China's annual R&D expenditure increased 169 times from 14.3 billion yuan (2.21 billion US dollars) in the early 1990s to 2.44 trillion yuan in 2020. According to the exchange rate conversion, China's total R&D expenditure in 2013 surpassed that of Japan, becom...