precursors是什么意思？

Phenyl ( or polyphenyl ) substituted epoxides serve as excellent precursors to phenyl ( or diphenyl ) carbenes.某些苯代 ( 或多苯 ) 环氧乙烷是制取带苯环 ( 或二苯 ) 碳烯的极好原料.Note the presence of megakaryocytes, erythroid islands, and granulocy...

precursors的音标：precursors的英式发音音标为：[pri:'kɜ:səz]precursors的美式发音音标为：[pri'kɜsəz]...

Glycine and succinyl - CoA are precursors of 5 - aminolevulinic acid ( ALA ) biosynthesis.甘氨酸和琥珀酸是红假单胞菌生物转化合成5-氨基乙酰丙酸 ( ALA ) 的前体.Phenyl ( or polyphenyl ) substituted epoxides serve as excellent precursors to phenyl ( or...

苯丙酰胺酯...

Harry Hopkins always went to the root of the matter.哈里·霍普金斯常常能抓住问题的实质.Hopkins sent me the earliest intimation.霍普金斯最先将情况通知我.It was at university that he first encountered Hopkins...他第一次遇见霍普金斯是在上大学的时候。Mr. Hopkins would not...

illustration的近义词有：drawing, illustration, cartoon, diagram, picture, sketch, painting, portrait,example, instance, case, sample, illustration, specimen。下面这些名词都表示"画，图"的含义：drawing：指用线条或色彩绘成的图画。illustration：指插入书页之间帮助说明的任何插图或...

v.（使）发酵( ferment的过去式和过去分词 )，（使）激动，骚动，骚扰...

“传输”的拼音为：chuán shū...

Before leaving I attended the 47 th commencement of Cornell on June 16, 1914.离校之前,我还在1914年6月16日参加了康乃尔的第47届毕业典礼.I saw the whole thing from my Cornell dorm room.我在我在康奈尔的寝室看了正常比赛.Conclusion Cornell index, Sokolow index and ...

prefabricating的音标：...

unbiased的近义词/同义词有：fair, impartial, just, unprejudiced, equable, straightforward, catholic, objective, impersonal, disinterested, factual, literal。adj.unbiased的近义词（公平的）：fair, impartial, just, unprejudiced。unbiased的近义词（）：e...

n.总星系，超星系...

manliness的音标：manliness的英式发音音标为：['mænlɪnəs]manliness的美式发音音标为：['mænlɪnəs]...

meteorologist的音标：meteorologist的英式发音音标为：[ˌmi:tiə'rɒlədʒɪst]meteorologist的美式发音音标为：[ˌmitiə'rɑlədʒɪst]...

ignorant的音标：ignorant的英式发音音标为：['ɪgnərənt]ignorant的美式发音音标为：['ɪɡnərənt]...

hepatonephromegaly的音标：hepatonephromegaly的英式发音音标为：[hɪpætəʊnefrɒ'meɡəlɪ]hepatonephromegaly的美式发音音标为：[hɪpætoʊnefrɒ'meɡəlɪ]...

n.纸牌玩法之一...

ham的音标：ham的英式发音音标为：[hæm]ham的美式发音音标为：[hæm]...