主要为水生的节肢动物,通常身体分节并有壳质的外骨骼.The outermost layer of cuticle of an arthropod exoskeleton, composed mostly of wax.一群主要是水生的 、 能行 光合作用 而无法精确定义的有机体.Members of a group of mostly aquatic, photosynthetic organisms ( see photosynthe...
Sean O'Leary has been named in the England squad to tour Argentina.肖恩·奥利里已入选参加阿根廷巡回赛的英格兰队大名单。Britain and Argentina reopened diplomatic relations.英国和阿根廷重新建立了外交关系。In 1816, Argentina declared its independence from Spai...
We have, therefore , in both of the examples above, heterocyclic compounds with " built - in " or latent functionality.上述两例中的杂环化合物,都具有 “ 固有的 ” 或潜在的官能基.Morphine: Heterocyclic compound, narcotic analgesic alkaloid original...