And it's not only very cool chemistry, because as a bioinorganic chemist, nitrogen fixation is one of my favorite fixations, if you will, since you need iron and sometimes vanadium or molybdenum to accomplish that biochemically.

不仅是非常酷的化学，因为作为名物无机化学家， 氮固定是我最喜欢的研究方向之，因为化过程需要铁， 有时还需要钒或钼。

A fifth of the total now recognized have stood the test of time Some like gold iron and sulfur had been known since ancient days Others like manganese, molybdenum and tungsten were recent discoveries.

五分之目前已知的元素经受住了时间的考验，有些如金、铁和硫自古以来就被人们所熟知，而锰、钼和钨等则是最近才被发的。