Poly ( vinyl alcohol ) has been protected against radiation by benzalation and benzoylation.聚乙烯醇 的耐辐解可通地苄叉化和苯甲酰化提高.Poly alcohol has been protected against radiation by benzalation and benzoylation.聚乙烯醇的耐辐解可通过苄叉化和苯甲酰化提高.M...
He was well acquainted with the literature of France, Germany and Holland.他对于法国、德国和荷兰的文学了如指掌。He knew what he wanted to do from the age of 14.他14岁起就知道自己日后干什么了。He was hand-picked for this job by the Admiral.他是由海军上将精心挑选出来担任...
She sat there crocheting all day.她整天坐在那里用钩针编织东西.The crafts teacher is skillful in knitting , crocheting, embroidery, and the use of the hand loom.手工艺教师善于纺织、钩编 、 刺绣和使用手摇织布机....
An airliner came close to disaster while approaching Heathrow Airport.一架大型客机在飞近希思罗机场时差点儿发生空难。The passengers were shepherded across the tarmac to the airliner.旅客们被引导走过跑道去上飞机.The pilot landed the airliner safely.驾驶员使客机安全着陆...
约有250位来宾参加了奉献典礼。Some 250 guests attended the dedication ceremony.所有来宾必须到接待处报到。All visitors must report to reception.博物馆正在修建新的来宾接待室。The museum is building a new reception centre for visitors....