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]...

daunt的一般过去时为：daunted...

impeller的音标：impeller的英式发音音标为：[ɪm'pelə]impeller的美式发音音标为：[ɪm'pelə]...

mockingbird的音标：mockingbird的英式发音音标为：['mɒkɪŋbɜ:d]mockingbird的美式发音音标为：['mɑkɪŋbɜrd]...

fracture的音标：fracture的英式发音音标为：['fræktʃə(r)]fracture的美式发音音标为：['fræktʃɚ]...

n.纱，线，（尤指）毛线，故事，（旅行）轶事vi.讲故事...

One of the men shone a torch in his face...其中一名男子用火把照着他的脸。He has always carried a torch for Barbara.他一直单恋芭芭拉。The torch can bring higher arc voltage with lower fluctuation by elongating the arc.该喷枪能够提高电弧电压并减小电弧电压波动.Hellfi...

n.（猪等家畜的）咽喉肿胀，（奶牛，奶羊等的）乳房炎...

非泼拉酮...

n.无月期间，黑暗时间，空挡...

“背叛的”的英语可以翻译为：evolting，treacherous，[法] traitorous ...

bad的最高级为：worst...

n.留置权，扣押权( lien的名词复数 )...

n.无目的，盲目性...

accredited的音标：accredited的英式发音音标为：[ə'kredɪtɪd]accredited的美式发音音标为：[ə'krɛdɪtɪd]...