发明创造的敲门砖──机遇历史上许多科学家的重大发明创造，有些是来自偶然的机会。碰上偶然的机会好像并不难，但是要从偶然事件中悟出一个发明来，并不是人人都能办到的。它不仅要求发明者有丰富的科学知识，而且还要有敏锐的洞察力，能透过偶然现象的表面去寻找隐藏的... Stepping stone for inventions - some of the major inventions and innovations of many scientists in the history of opportunity, some came by chance. It does not seem hard to run into occasional opportunities, but not everybody can come up with an invention from an accident. It not only requires inventors to have a wealth of scientific knowledge, but also has a keen insight, through the surface of the accidental phenomenon to find the hidden ...