Flavin: Any of a class of organic compounds, pale yellow biological pigments that fluoresce green.黄素: 一组浅黄 、 绿萤光生物色素,在植物和动物组织中分布很广,含量少.The cheaper FNDs fluoresce roughly as well as those produced with an electron beam.此种...
We tried to grow some copper sulphate crystals with our children.我们想跟孩子们一起制作硫酸铜晶体。Adding sulphate to the solution will give a precipitate.将硫酸盐加入该溶液会产生沉淀.More ammonium sulphate solution is being recovered in the process o...
他刚过午夜就睡着了，睡得还算安稳。He fell asleep just past midnight with tolerable ease.他在午夜时分离开，避开了记者的追踪。He gave reporters the slip by leaving at midnight.富兰克林直到午夜过后很久才出现。Franklin did not turn up until well after midnight....