新闻报道透露上层大气的臭氧浓度在上个月有所下降。Press reports revealed that ozone levels in the upper atmosphere fell during the past month.大气的各种气体大约吸收这种向上辐射的70%.Various gases of the atmosphere absorb about 70 % of this upwelling radiation.天文学家...
他立誓决不泄露秘密.He swore never to divulge the secret.你已立誓对我忠实.You have sworn to be faithful to me.修女须立誓保持清贫 、 贞洁、顺从.Nuns are under vows of poverty, chastity and obedience....
He had purchased a painting in reliance upon the authentication of a well-regarded expert.他买下了一幅经知名专家鉴定过的画。Computer security technology includes mainly: Authentication, Encryption, Access Control, Auditing and so on.计算机网...