acetal什么意思？

Butyraldehyde 1,2 proparediol acetal was synthesized by using stannous chloride as catalyst.以非质子酸氯化亚锡为催化剂,催化合成了丁醛-1,2-丙二醇缩醛.Butyraldehyde 1,2 propanediol acetal was synthesized by using stannous chloride as catalyst.以非质子...

The necessary material of 2 - ( 2 - methoethyl ) acetaldehyde diethyl acetal was synthesized in addition.另外还合成了必需原料 2- ( 2- 甲氧基乙氧基 ) 乙醛二乙醇缩醛.Butyraldehyde 1,2 propanediol acetal was synthesized by using stannous chloride...

acetal的音标：acetal的英式发音音标为：['æsɪtæl]acetal的美式发音音标为：['æsəˌtæl]...

euphonies的音标：...

He knew how the traffic congested at the junction of Seventh Avenue and Forty-second Street.他知道在第7街和第42街交叉处交通是多么拥挤。In the seventh paragraph, the author point out the deficiency and faultiness of this paper.第七章指出了本文工作的不足和...

Any trawl through the band's interviews will reveal statements that are challenging and incisive.随便选取一段对该乐队的访谈都能发现令人深思、犀利精辟的言论.In trawl fishing, huge nets are slowly pulled below the water to collect fish.拖网捕鱼时, 巨大的...

It's only available in hardback.这本书只有精装本.What's the price of the hardback?精装本多少钱？His second book came out in hardback last month.他的第二本书上个月出了精装本。It’s only available in hardback.这本书只有精装本。His autobiography has sol...

subscribed的音标：...

他曾告诉一位采访者，他甚至都不喜欢摇滚乐。He once told an interviewer that he didn't even like rock music.采访者常常需要故意唱唱反调以使访谈继续下去。Often the interviewer will need to play devil's advocate in order to get a discussion going.她从后门偷偷溜走,躲开...

“荫度”的英语可以翻译为：arboricity ...

Lift the turfs carefully— they can be re-used elsewhere.抬草皮时小心点——它们还能在别处重新利用。We have ordered several turfs to make our lawn.我们订购了一些草皮块铺个草坪.Mr. Brown bought some turfs to repair the lawn in his front yard.布朗先生买了一些草皮块来修补他家...

n.小景气，略为繁荣，小繁荣...

“范式”的英语可以翻译为：canonical form，normal form ...

“偶尔”的近义词/同义词：偶然, 有时, 无意, 时常, 不常, 一时, 临时, 权且。...

然后他们请小杨吹口琴.Then they called on Xiao Yang to play the harmonica.他口琴吹得很好.He playea quite well on the mouth - organ.看见大象吹口琴, 孩子们这个乐啊!When they saw the elephant blowing the mouth organ , the children roared with laughter....

amine acid的音标：amine acid的英式发音音标为：['æmi:n 'æsid]amine acid的美式发音音标为：[ə'min 'æsɪd]...

Grinstead的音标：...

Amniocentesis is the removal of fluid from the amniotic sac.羊膜穿刺术是从羊膜囊抽取羊水的技术.Objective To investigate some questions about ultrasound localization of amniocentesis.目的探讨羊膜腔穿刺术超声定位的有关问题.Amniocentesis is the standard prena...