Most direct substitution of groups bound to an aromatic nucleus is limited to diazonium salts.大多数连于芳核能被直接取代的基团仅限于重氮盐.Severe steric effects at the reactive carbon would impede the substitution.大的立体效应阻止在碳上的取代.We use saccha...
这条路增加了停车区后宽度缩减到了18英尺。The road was reduced to 18ft in width by adding parking bays.12英寸左右的宽度绝对是你应考虑的最低值。About 12 inches wide is the absolute minimum you should consider.鞍具有各种不同的宽度。Saddles are made in a wide range of diffe...
Look at the information that precedes the paragraph in question.查看正在讨论的这段文字前面的信息。The length of a paragraph depends on the information it conveys.段落的长度取决于它所传达的信息。The critic's review of the play was just a paragraph o...