The infra - red spectra of quinones present a number of interesting features.醌类的红外光谱具有一些有趣的性质.Ethylene and trans - dichloroethylene are both inactive in the infra - red in this region.乙烯和反式二氯乙烯在红外光谱的这个区域都无活性.Infra - red ...
保险业提出了自己的全民医疗保健方案。The insurance industry has produced its own proposals for universal health care.她从事保险业工作.She works in insurance.保险业立足于信用.The insurance is grounded on trust....
The uncalled-for criticism grieved her.无缘无故的批评使她伤心。The uncalled - for criticism grieved her.无缘无故的批评使她伤心.I'm sorry. That was uncalled for.对不起，失言了。I shall ignore that uncalled-for remark.我不会理会那句不负责任的话的。His comments we...
An ulcer perforates the duodenal wall.溃疡使十二指肠壁穿孔.Gastric and duodenal ulcers were noted to evolve from early superficial mucosal disease.在早期浅表的粘膜病变上出现胃和十二指肠溃疡.The complications of duodenal ulcer that require surgical man...