I think, you know, when -- when we talk about stress, it's a big word to describe lots of very specific reactions that we may not even register, except that it doesn't feel good.

我觉得，当我们谈到压力的时候，这是一个重要的词，可以用来描述很多我们可能根本没有注意到的非常具体的反应，除了感觉不舒服。

Around the year 2000, Sharpless and Meldal separately discovered a specific chemical reaction using copper ions as a catalyst which " changed the playing field" and became " the cream of the crop" , said Silvia Diez-Gonzalez, a chemist at Imperial College London.

伦敦帝国理工学院化学家西尔维娅·迪兹-冈萨雷斯说，大约在 2000 年，沙普利斯和梅尔达尔分别发现了一种使用铜离子作为催化剂的特定化学反应，这种反应“改变了化学反应的环境”，成为“百里挑一的化学物质”。