中国人民的老朋友，我们尊敬的中国科学技术史权威李约瑟大师，离开我们已经五周年了，今年又是他１００周年的年份，缅怀贤哲，风范长存，斯人永在，斯人永远留在中国和世界科学技术史纪念碑上。中国人民永远记得这位誉满全球的学者，在中国人民最艰苦困难的年代、抗日战争最 The oldest friend of the Chinese people, our dear author, Joseph Needham, the most authoritative Chinese historian of science and technology, has left us for the fifth anniversary. This year marks the centenary of his 100th anniversary. We cherish the memory of sages and demeanor. China and the world monument of history of science and technology. The Chinese people will always remember this world-renowned scholar. In the most difficult and difficult period for the Chinese people, the war on Japan was most