1925年，A. Vilsmeier及其团队报道了利用POCl3和N-甲基乙酰苯胺反应得到氯化4-氯-1,2-二甲基喹啉盐的文章。接着他们深入研究发现，N-甲基甲酰苯胺和POCl3反应可以得到一种 ...

NASA scientists estimated Earth in 2024 was about 1.47 degrees Celsius warmer than the mid-19th century average (1850-1900).

Shanghai temperatures are set to take a roller coaster ride, with highs predicted to peek at 14 degrees Celsius on Tuesday, ...