at random 任意,随便; 任意地,随机地; 随便地,任意地; 随机的,任意的; 随机地,任意地; 随意地,任意地; 随意地,随机地
random n. 〔罕用语〕胡乱行为,偶然的[随便的]行动[过程]。 adj. 1.任意的,胡乱的,随便的;(话等)信口乱说的;(人等)偶然碰到的。 2.随机的;【物理学】无规则的;(石工)(大小)不齐的。 a random guess 瞎猜。 a random shot 乱射(的子弹);流弹。 at random 碰运气地;无目标地,漫无目的地。 n. -icity 随机性,无规性。
Some ideas of poly propylene random copolymer applied in engineering 管件工程应用的几点体会
Structure and properties of the special random copolymer of propylene for pipes 管材专用料的结构与性能
Pp - r propylene random copolymer materials for piping systems for hot and cold water installations 冷热水管道系统用无规共聚聚丙烯
Synthesis and characterization of poly aryl ether ether ketone ketone random copolymers containing silicon 主链硅杂化聚芳醚醚酮酮的合成与表征
Synthesis and characterization of novel methyl substituted poly aryl ether ketone ether sulfone ether ketone random copolymers 合成芳基芳酰基偶氮化合物的简便有效的新方法
Synthesis and characterization of poly aryl ether ketone poly aryl ether sulfone ether ketone ketone random copolymers with methyl pendant 含甲基侧基聚芳醚砜醚酮酮的合成与表征
With 5 % - 15 % ( by mass fraction ) ethyl - benzene as diluent , styrene - acrylonitrile random copolymer was synthesized by means of the continuous bulk polymerization of styrene and acrylonitrile initiated by heating 摘要以苯乙烯、丙烯腈在添加质量分数为5 % ~ 15 %的乙苯作稀释剂的条件下,进行热引发连续本体聚合,合成了无规苯乙烯丙烯腈共聚物。
Through the gc analyses and the nuclear magnetic resonance analyses showed that the copolyesters obtained here were random copolymers of 3hb and 3hv units . hv fraction in the copolymers reached 38 % . through thermal analyses showed that the melting point was reduced and pyrolysis temperature was increased 经气相色谱、核磁共振分析,此共聚物为3hb与3hv所组成的不规则共聚物, hv组分在共聚物中约占38 ;经热分析,获得的phbv共聚物的熔点有所降低,分解温度有所升高,在性能上优于phb 。
Study on the preparation and relationship between micro - structure and mechanical properties of epoxy / rubber / clay composites epoxy / rubber / clay composite has been prepared by the melted intercalation of octadyl ammonium exchanged montmorillonite ( c18 ) with dgeba and carboxyl - terminated butadiene - acrylonitrile random copolymers ( ctbn ) , and piperidine as the curing agent 环氧树脂橡胶粘土三元复合材料采用熔融共混法制备了环氧树脂橡胶粘土三元复合材料,就ctbn 、 c18含量、加料顺序和固化工艺等制备工艺对c18在三元复合材料结构以及材料的力学性能的影响进行了研究。