Williamson reaction is one important method to prepare unsymmetric ether.Williamson反应是制备不对称醚类化合物的重要方法.Brydon's team-mate Martin Williamson consolidated his lead in the National League when he won the latest round.布赖...
Brydon's team-mate Martin Williamson consolidated his lead in the National League when he won the latest round.布赖登的队友马丁·威廉森在最近一轮比赛中获胜，巩固了自己在全国联赛中的领先地位。Williamson reaction is one important method to prepare unsymmetr...
某些植物的珠被和珠心细胞形成完全正常的胚.The cells of the integument and nucellus of some plants form perfectly normal embryos.大多数被子植物的胚珠有两层珠被, 而裸子植物通常只有一层.Most angiosperm ovules possess two integuments, while gymnosperms usually have only ...
家庭医生能够就合适的节育措施提出建议。A family doctor will be able to advise on suitable birth control.她参加争取妇女选举权的运动，也是节育倡导者。She was a suffragette and a birth control pioneer.她1930年写了篇女性主义的短文《论节育》。She produced a feminist tract, "Comments o...
I've had a lifelong fascination with the sea and with small boats.我一生都对大海和小船着迷。The fascination of discovery has never left him.他一直迷恋发现的魅力。Water holds a fascination for most children.水对多数孩子都有极大的吸引力。...
He reverentially returned the novel to a glass-fronted bookcase.他毕恭毕敬地把小说放回了正面装有玻璃的书架。He fronted a formidable band of fighters.他率领着一队可畏的斗士。A glass - fronted cabinet displayed a collection of china figurines.玻璃面展柜中陈列了一系列瓷...
Altogether, it was a delightful town garden, peaceful and secluded.总体上说，这是个令人愉快的城市花园，宁静而偏僻。He has attempted to find a peaceful solution to the Ossetian conflict.他试图寻求和平解决奥赛梯冲突的方案。They emphasised that their equipment was ...
When do I need to use an apostrophe?什么时候用撇号？Answer these questions, using the words in parentheses. Put the apostrophe in the right place.用句后括号中的词或词组来回答问题, 注意撇号的位置.'It's' (with an apostrophe) should be use...