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...
By the 1930s the wristwatch had almost completely supplanted the pocket watch.到了20世纪30年代，手表几乎完全取代了怀表。He glanced at his wristwatch. "I suppose we'd better make a move."他看一眼手表说：“我想我们最好动身吧。”It was so quiet I could hear...
I believe everyone is innately psychic.我相信每个人天生都有超自然的能力。Innately conservative, Confucius was fascinated by the last of these disciplines.由于生性保守, 孔子特别推崇“礼”.Different individuals are innately fitted for different kinds of ...
他们在布合板上钉了一张通告.They pinned up an announcement on a notice board.这家具是用贴柚木薄片的合板做成的.The furniture is made of plywood covered in teak veneer.本计画旨在建立复合材料多层叠合板之三维解析渐近理论.A three - dimensional asymptotic theory for multilayered c...
The chutney should be a thick, pulpy consistency.酸辣酱应该是浓稠的软糊状。Where's that chutney hiding -- the one you picked up last month?你上个月收起来的芒果 调味 剂到哪儿去了 呢 ?...