The best way to represent the isotactic structure is with molecular models.表示等规结构的最好方法是用分子模型.Polyacetaldehyde may exist in atactic, syndiotactic and isotactic forms.聚乙醛可以以无规, 间同和全同形式存在.Polyacetadehyde may exist in atacti...
中子和质子构成了原子核.The neutrons and protons form the core of the atom.原子核由中子 、 质子和其他粒子构成.The nucleus of an atom consists of neutrons, protons and other particles.中子就是原子核里不带电的粒子。A neutron is simply a neutral particle in the nucl...
We were staying in a seedy hotel close to the red light district.我们当时住在紧挨着红灯区的一家脏乱不堪的旅馆里。Frank drifted into running dodgy errands for a seedy local villain.弗兰克开始为当地一个下流的恶人跑腿做坏事。a seedy appearance褴褛的外表Frank ran dodgy erra...