A nonaddictive opium derivative ,C20H21NO4,used medicinally to relieve spasms of smooth muscle.

罂粟碱由苄基异喹啉衍生的一种结晶生物碱,C20H21NO4,医药上用作解痉剂

属类：综合句库--

Treatment of the peptide with l-fluoro-2.4-dinitrobenzene followed by complete hydrolysis and chromatography indicated the presence of the 2,4-dinitrophenyl derivative of tyrosine. No free tyrosine could be found.

用1-氟-2,4-二硝基苯处理后完全水解,经层析表明,存在Tyr的2,4。二硝基苯衍生物,无自由Tyr存在。

属类：化学及生命科学-化学-化学习题

Ozone is formed in the reaction, and a nitro derivative of the olefin

在反应中形成臭氧及烯烃的硝基衍生物。

属类：综合句库--

In calculus, the derivative equals zero or does not exist at a function’s minimum point.

在微积分中,在函数的极小值点上导数等于零或者不存在导数。

属类：自然科学-数学-

A letter or symbol in typography written above a set name to denote a power or a derivative , or to identify a particular element of that set

在印刷技术中,写在一个集合名上方的一种字母或符号,用来表示乘方或导数,或用来标记该集合中的某个具体元素。

属类：综合句库--

The deoxygenated benzene derivative (105)is obtained

这就得到脱氧的苯衍生物(105)。

属类：综合句库--

It is a sort of derivative which disarranges and disconcerts the whole science of etymologists

这种字的转借法,绝不是字源学家的学问所能解释的。

属类：综合句库--

Synthesis and Photoelectricity of Poly(p-phenylene Vinylene)Derivative Containing Benzodioxazole Segments in the Main Chain

主链插入苯并二噁唑环的PPV聚合物的合成及其光电性质

属类：行业术语-中文论文标题-

They are principally composed of a galactose derivative , galacturonic acid. In fruits, pectin keeps the walls of adjacent cells joined together, helping them remain firm and hold their shape.

主要由半乳糖复合物和乳酸组成。在果实中,果胶使相邻细胞的细胞壁连结在一起,进而使果实保持坚固与形状。

属类：化学及生命科学-化学-

A quasilinear equation is one in which the highest-order derivative appears linearly

最高阶导数线性地出现的那种方程是准线性方程。

属类：综合句库--